28. Think after you read ____.
A.which words do you need to look up B. you need to look up which words
C. which words need you look up D. which words you need to look up
27. Great changes _______in our city in the past twenty years.
A. have been taken place B. have taken place
C. took place D. were taken place
26. He said he would rather not ________it right now.
A. doing B. to do C. do D. to be doing
25. These photos reminded him of the places ________he visited last year.
A. which B. that C.不填 D. all above
24. Is this park ________has been built to keep the milu dear?
A. which C. the one C. that D. the one that
23. Environmental experts are those who devote ______to______ nature and environment.
A. them…protecting B. their…protect
C. themselves…to protect D. themselves…protecting
