---I wonder what makes you a successful manager.
---I _______as a waiter for five years and it makes a lot of contributions to my today’s work.
A. serve B. have served C. was serving D. served
---Excuse me, sir. When can we have a swim in the pool?
---Not until it ________ next month.
A. repairs B. will repair
C. is repaired D. will be repaired
It’s best to stay indoors, ________when PM2.5 has reached dangerous levels.
A. exactly B. possibly C. especially D. generally
---The stuntman is planning to walk on the wings of a flying plane.
---What? I have never heard of ________ idea before.
A. a crazier B. the crazier
C. a craziest D. the craziest
It is careless ________Tom to mistake the instrument ________ a toy again.
A. for； as B. of； as
C. for； for D. of； for
---Paul Walker, the world-famous actor had a serious car accident and was burnt to death.
---Both his family and fans ______ be very sad.
A. can B. may C. must D. should
