单项选择题


Questions 14 to 16 are based on a report that weather delay US shuttle launch. You now have 15 seconds to read Questions 14 to 16.
Why was it not a good day to launch the shuttle

A.Because there is something wrong with the shuttle.
B.Because thunderstorms was coming.
C.Because NASA wanted to choose a lucky date.
D.Because crew members changed their plans.
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