题目内容
15．Did she do his homework yesterday？（ 用 yet 替代 yesterday 改写句子）Has shedone his homework yet？
分析 --她昨天做作业了吗？
--她做完作业了吗？
解答 答案：Has；done．考查现在完成时态．yet已经，通常用于现在完成时态，结构是have/has+动词的过去分词．主语是she第三人称单数，用has，变一般疑问句助动词has提前．do的过去分词是done．答案是Has；done．
点评 现在完成时态，由"have/has+过去分词"构成，表示动作发生在过去，但与现在的情况有联系．也表示从过去某一时间开始一直延续到现在并还可能继续延续下去的动作．结合语境，注意人称变化及动词过去分词变化．
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5．"Mum，may Patti come over？"asked Meg．
"Not until you clean your room，"replied Mum．
Meg said over the（26）A，"I have to clean my room first．"
At the other end，Patti said，"My mum just said I can't go （27）B until I clean my room．"
After hanging up （挂断电话），the girls went to their own rooms．Slowly （28）D started tidying things up．
Patti suddenly had a（n） （29）C．She went to the study where her （30）D was working on the computer．"Mum，may Meg come over？"Patti asked．
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Then Patti called Meg．A few minutes（33）C，Meg went over to Patti's house．Her mum （34）D her to go because she had done some work on her room．Meg had （35）A promised to finish when she returned．
Patti（36）C the radio．While singing and talking，the girls （37）B．One task at a time，the room became tidy．Patti's mum was （38）D．She called Meg's mum to tell her what good work the girls had done．Meg's mum said Patti could come over to （39）A Meg．
The girls quickly went to Meg's house．They worked and played until the room was（40）C．The girls had learned that working together was really a good idea!
"Not until you clean your room，"replied Mum．
Meg said over the（26）A，"I have to clean my room first．"
At the other end，Patti said，"My mum just said I can't go （27）B until I clean my room．"
After hanging up （挂断电话），the girls went to their own rooms．Slowly （28）D started tidying things up．
Patti suddenly had a（n） （29）C．She went to the study where her （30）D was working on the computer．"Mum，may Meg come over？"Patti asked．
"（31）C，honey，"Patti's mum said．"But remember，you must make your room clean （32）B leaving the house．"
Then Patti called Meg．A few minutes（33）C，Meg went over to Patti's house．Her mum （34）D her to go because she had done some work on her room．Meg had （35）A promised to finish when she returned．
Patti（36）C the radio．While singing and talking，the girls （37）B．One task at a time，the room became tidy．Patti's mum was （38）D．She called Meg's mum to tell her what good work the girls had done．Meg's mum said Patti could come over to （39）A Meg．
The girls quickly went to Meg's house．They worked and played until the room was（40）C．The girls had learned that working together was really a good idea!
| 26．A．phone | B．room | C．window | D．radio |
| 27．A．somewhere | B．anywhere | C．everywhere | D．nowhere |
| 28．A．he | B．she | C．we | D．they |
| 29．A．joke | B．story | C．idea | D．interest |
| 30．A．brother | B．sister | C．dad | D．mum |
| 31．A．Sorry | B．Thanks | C．Sure | D．Good-bye |
| 32．A．after | B．before | C．until | D．though |
| 33．A．ago | B．early | C．later | D．before |
| 34．A．asked | B．advised | C．wanted | D．allowed |
| 35．A．also | B．never | C．often | D．only |
| 36．A．broke down | B．looked for | C．turned on | D．took off |
| 37．A．studied | B．worked | C．played | D．shouted |
| 38．A．worried | B．angry | C．healthy | D．pleased |
| 39．A．help | B．find | C．see | D．tell |
| 40．A．large | B．empty | C．clean | D．full． |
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