-Why ________ it rain at weekends?
-Never mind, let’s watch TV at home.
A．canB．wouldC．shallD．must
D

試題分析：考察情態(tài)動(dòng)詞用法。本句考察的是情態(tài)動(dòng)詞的特殊用法，must表示：偏偏，非得；句意：—為什么偏偏在周末下雨呢？—沒關(guān)系，我們在家看電視吧！。根據(jù)句意說明D正確。
點(diǎn)評：在平時(shí)的學(xué)習(xí)中既要注意情態(tài)動(dòng)詞的基本含義，也要注意情態(tài)動(dòng)詞的特殊意義，如must偏偏，非得；should竟然；mustn’t禁止，千萬不能；等等。情態(tài)動(dòng)詞Shall用于所有人稱，表示命令，警告，允諾；以及法律規(guī)定中要做的事情。
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