A. basis B. worry about C. afraid D. have A. think of B. at the back of C. ribbon D. beside A. applaud B. bear C. team D. velvet A. later on B. astronomical C. really D. worthless A. hay B. in one's way C. hard D. shark A. population B. older C. then D. imaginative A. allow B. help C. slow down D. literally A. parliament B. in front of C. photography D. let off A. call back B. cooperate C. soft D. hydrogen A. challenging B. introduce C. ceremony D. find