giúp mik câu 11, 12, 13

11. What do you think **of** the global warming? (B. of) 12. My sister enjoys **bargaining** when she goes shopping at the market. (A. bargaining) 13. My sister **doesn't usually play** sport because she is really busy. (A. doesn't usually) 14. We **were watching** the film on T.V when the earthquake happened.