【題目】---I wonder why he ______ so strangely these days.

---Recent pressure at study may account for his behavior.

A. was acting B. acted

C. is acting D. acts

【答案】C

【解析】考查動詞的時態(tài)。句意：——我納悶最近這些天他為什么行動詭異。——工作的壓力也許能夠解釋他的這種行為。根據(jù)時間狀語these days可知，“act”這一動作表示現(xiàn)階段一直存在的動作，用現(xiàn)在進(jìn)行時。故選C。

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