A. | hadn't acted | B. | haven't acted | C. | don't act | D. | won't act |
分析 句意為:如果我們現(xiàn)在不采取行動來保護環(huán)境,我們將來會后悔的.
解答 答案:C 句子成分分析:if引導(dǎo)條件狀語從句,act為從句中謂語動詞.逗號后為主句,live為主句謂語動詞,to protect和to regret是非謂語動詞做狀語.
根據(jù)if主句中的時態(tài)是一般將來時態(tài),可知從句應(yīng)使用一般現(xiàn)在時態(tài),且有now作為現(xiàn)在時態(tài)的標志詞,所以選擇C.
點評 一般在時間狀語從句中,用主將從現(xiàn)的規(guī)則,也就是,主句是一般將來時態(tài),從句一般用一般現(xiàn)在時態(tài),或相關(guān)的時態(tài).
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