A. When compared B. While comparing
C. Compare D. Comparing
22．The girl didn’t know who ______ for the broken vase.
A. will be blamed B. blamed C. was to blame D. blames
23．These natural parks are very important for preserving many animals, which would ______ run the risk of becoming extinct(灭绝的)．
A. otherwise B. other than C. therefore D. in another way
