Unit 15 We’re trying to save the manatees

3. both you and mr zhang are going to work on the farm for a week. （改為否定句）
          you           mr zhang           going to work on the farm for a week.
4. uncle wang has worked here  since twenty years ago. （對劃線部分提問）
              has uncle wang worked here?  
5. students must do homework every day. （改為被動語態）
homework               by students every day.
解析 答案1. it is… since 用表示一段時間的句型來表示上句中的時間段。
2. such an …film  such…that與 so …that 同義，所不同的是such 修飾名詞，such和名詞之間可插入不定冠詞；so修飾形容詞或副詞，原句中so后緊跟形容詞，而將不定冠詞放在形容詞之后。
3. neither…nor…is  both…and 的全部否定應用neither…nor, neither…nor連接兩個主語時，謂語須跟后面的主語在人稱和數上保持一致。
4. how long 詢問時間長度用how long，表示多久、多長時間。
5. must be done含有情態動詞的被動語態，助動詞be要用原形。
【情景發散】
填空，補全對話
a：hello, ann.
b:  hello, wuling. you  1  look well. what’s the  2 ?   
a:  i’ve got a headache and a cough.
b:   3  you seen the  4 ?  
a:  no, i’ve taken my  5  . it  6  to be all right. nothing  7  , i think.
b:  maybe you’ve   8  a bit of a cold. you’d   9  take some medicine and drink more water. you’ll be well soon  10   a good rest.
a:  i think so. thank you very much. goodbye.
b:  bye.
解析  根據上下文的意思，補全對話，每空只填一詞，使其完整達意。這類試題在某種程度上來講比“七選五”式對話還要難些，后者是客觀性選擇填空補全對話，本題是主觀性限制填詞補全對話。解這類題一是根據所設情景、特別注意上下文的關系及句、段意，二是要填寫正確單詞，本題主要講的是求醫治病的一段對話。
答案  1. don’t  2. matter   3. have   4. doctor  5. temperature   6. seems  7. serious 8. caught   9. better   10. after
【綜合發散】
根據短文內容，在每題空白處填上適當的詞（首字母已給出）
a greedy man
 mr smith lived in a town by the sea. he has a few shops in the centre there. he managed(管理)them carefully and got a lot of money. he was very rich but he didn’t think he was the richest in the town. so he tried to get more money. once mr smith was asked to dinner. he heard there was a circus troupe（馬戲團）in the town which had nothing strange except a five-legged （五只腿的）cow. but people were interested in it and most of them went to see it.