【題目】We used to ________ in the evening, but now we are used to________ early in the morning.

A.exercise; exerciseB.exercise; exercisingC.exercised; exercise

【答案】B

【解析】

句意：我們過去經(jīng)常在晚上鍛煉．但是現(xiàn)在我們習(xí)慣于在早上鍛煉。

考查動詞的固定搭配。exercise鍛煉，動詞原形；exercising動詞三單形式；exercised動詞過去形式。uesd to do sth過去常常做某事；used to doing sth習(xí)慣于做某事。根據(jù)題干中but now可知，前半句意思是我們過去經(jīng)常在晚上鍛煉；所以第一個空填動詞原形exercise；后半句意思是“但是現(xiàn)在我們習(xí)慣于在早上鍛煉”，所以第二個空填 exercising。故選B。

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