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1、Unit 21Human Biology条件句和混合条件句.用所给动词的适当形式填空1.If he hadnt learnt Japanese last term，he_(not，speak) it so fluently now.答案：could not speak2If you_(set) off yesterday，you_(walk) with your mother now.答案：had set；would walk3If I had worked hard at school，I_(study) in this famous university now.答案：would stud
2、y4Luckily we had arrived before the rain came.Yes，we _(walk) in the rain now if we_(not，start) out earlier.答案：would be walking；hadnt started5If I_(not，have) so many friends，I_(not，finish) the task within such a short time.答案：hadnt；wouldnt have finished6_I _(devote) more energies to my study instead
3、of being crazy about Internet games，I would be sitting in a comfortable office now.答案：Had；devoted7_I_(persuade) him not to do so，he wouldnt have made such a serious mistake.答案：Had；persuaded 8_I_(learn) my lessons hard，I wouldnt have failed in the final exams.答案：Had；learned 9If you had brought your s
4、wimsuit with you，we_(go) swimming in the lake now.答案：could go10_ you_(fire)，your health care and other benefits will be immediately cut off.答案：Should；be fired.完成句子1他要是多得六票，现在就是我们的主席了。If he_six more votes，he_our chairman now.答案： had received；would be2如果玛丽是一位个性强的姑娘，当时她就会拒绝老板了。If Mary_a girl of strong
5、character，she_“No” to her boss.答案：were；would have said 3要不是有医生的照料，我此时就不会在这里和你说话了。If it_for the doctors care，I_to you now.答案：hadnt been；would not be speaking4如果你登上那航班，你现在就不会在此享受生活了。If you_on board the plane，you_your life here now.答案：had gone；would not be enjoying 5如果你昨天来，你就会碰到乔治娅了。If you _yesterday，y
6、ou_Georgia.答案：had come；would have met.语法与写作(按照要求转换句子)1. Had you followed your fathers advice，you would be much better now.(转换为if条件句)_答案： If you had followed your fathers advice，you would be much better now.2If you had not helped me，I would have failed.(转换为含蓄虚拟条件句)_your help，I would have failed.答案： W
7、ithout/But for 3If I were a teacher，I would have lots of students.(转换为省略句)_I a teacher，I would have lots of students.答案：Were4If we should visit Zhejiang University tomorrow，I would play basketball there.(转换为省略句)_Zhejiang University tomorrow，I would play basketball there.答案：Should we visit 情态动词和表达法.用
8、适当的情态动词填空1Our parents and teachers often tell us that we_ not be careful enough no matter what we do.答案：can2Can I borrow your car，Mum?If you_.答案：must3The new law states that people_not drive after drinking alcohol.答案：must4Mr Smith has promised that all of us will pass the exam，so it_not be so diffic
9、ult as you imagine.答案：can5Miss Amelia left a deep impression on us while working in our school.She _greet us with a smile whenever she met us.答案：would6George had to give a speech in front of 5,000 people.Whew！Thats a big audience.He _have been nervous.He was，but nobody could tell.答案：must7The winner
10、of the race is a tall and thin boy with thick glasses.Then it _not be my friend，Mike，who looks like a “meat ball”答案：can8We are all surprised at the fact that the two neighbors_not know each other though having lived so close for 8 years.答案：should9Can I pay the bill by check?Sorry，sir.But it is the m
11、anagement rule of our hotel that payment _be paid in cash.答案：shall10Could I have the television on?Yes，you_./No，you_.答案：can；cant11If that is the case，we _as well try.答案：may/might12. You have worked hard all day.You_be tired.答案：must13I dressed very warmly for the trip，but I _have done so.The weather
12、was hot.答案：neednt14Mike_have found his car，for he came to work by bus this morning.答案：cant15Why didnt you answer my phone call?Well，I_have been sleeping，so I didnt hear it.答案：must16. This old man is strange.He_sit for hours without saying anything.答案：will.任务型阅读How to find time for yourselfDo you eve
13、r find yourself longing for some time for yourself？Many of us are so busy with work，school，and home life that often there is no time left over to do something that you enjoy. What follows are some ways to carve out that essential time you need to slow down，enjoy life.1_ This is a great one because youre accomplishing many things at once.Youre getting exercise，you have time to think or enjoy music，and youre helping to save the environment.Arrive early.2._ Then use t
