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
22. __________unexpected advice they have given us!
A. What B. what an C. How D. How an
