【題目】—Are train services now back to ________ after last week’s snowstorm?

—Yes, they are.

A. ordinary B. normal

C. common D. usual

【答案】B

【解析】考查名詞。A. ordinary普通；平常的人（或事）；B. normal正常，常態(tài)；C. common普通；D. usual通常的。句意：——上個星期的暴雪過后，火車運營恢復到正常了嗎?——是的。be back to 在這里是“恢復到……狀態(tài)”的意思，to是介詞，后面跟名詞作賓語。normal做名詞用是“正常；標準；常態(tài)”的意思。故選B。

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