【題目】I think _______ necessary for us_________.

A. it; to keep exercising B. it’s; to keep exercising

C. it; keeping exercising D. A & B

【答案】D

【解析】

句意：我認為對我們來說一直鍛煉是必要的。根據(jù)句型think it+形容詞+for sb to do sth“認為做某事對某人來說是……”根據(jù)句型it’s+形容詞+for sb to do sth,表示“做某事對某人來說是……”，故選D。

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