16.Don't throw waste paper on the ground, please. (保持原句意思)
You ___________ ___________ to throw waste paper on the ground.
17.It's about ten minutes' walk from my home to my school. (对划线部分提问)
___________ ____________ is it from your home to your school?
18.Mary had a wonderful time with her family at Christmas.(一般疑问句)
__________ Mary __________ a wonderful time with her family at Christmas?
19.The university has achieved new progress since six years ago.(划线提问)
__________ __________ has the university achieved new progress ?
20.I don't know when we shall start the work.(简单句)
I don't know when ___________ ___________the work.
21.Tom can't speak French. Jack can't speak French, either.(句意不变)
__________ Tom __________ Jack can speak French.
22.Mike will come if you invite him(句意不变)
Mike __________ come __________ you invite him.
23. Peter often has bread for his breakfast. (改为否定句)
Peter ___________ ___________ bread for his breakfast.
24. I have already received some Christmas cards from my friends. (改为一般疑问句)
___________ you received ___________ Christmas cards from your friends yet?
25. The small boy stopped crying after he saw his mother.(保持原句意思)
The small boy ___________ stop crying ___________ he saw his mother.
26. It took me half an hour to go to the People's Square by underground. (对划线部分提问)
____________ ___________ did it take you to go to the People's Square by underground?
27. We must protect our earth well. (改为被动语态)
Our earth must ____________ ____________ by us well.
28. Mr. Lee studies Chinese in the university. (改为否定句)
Mr. Lee __________ __________ Chinese in the university.
29. The children spent fifty per cent of their savings on books. (对划线部分提问)
__________ __________ did the children spend on books?
30. The doctor saved the sick baby in the end. (改为被动语态)
The sick baby __________ __________ in the end.
31. The fish will go bad, so you'd better put it in the fridge. (保持原句意思)
The fish will go bad __________ you __________ put it in the fridge.
参考答案:
16.aren't allowed/ought to 17.How,far
18.Did have 19.How long 20.to start 21.Neither nor 22.won't unless
23.doesn't, have 24.Have, any 25.didn't, until 26.How, long 27.be,protected
28.doesn't, study 29.How, much 30.was, saved 31.if,don't