A. | are working | B. | work | ||
C. | have been worked | D. | have been working |
分析 我們一直努力了好幾個小時,但是至今善未得出任何的結(jié)論.
解答 答案:D.根據(jù)but后的現(xiàn)在完成時態(tài),可以判斷出到現(xiàn)在還沒有得出結(jié)論,有可能還要繼續(xù)下去,所以要現(xiàn)在完成進行時..C表示現(xiàn)在完成時的被動態(tài),與題意不符.
點評 考查現(xiàn)在完成進行時.
reach vt.到達,達到,伸出,影響 vi.達到,延伸,伸出手,傳開.
1.reach after 努力謀求,竭力達到 伸手想抓
2.reach back 回憶,回顧
3.reach for 伸出手去抓
4.reach out 伸手拿[抓]; 伸向前; 追求; 伸出援助之手,提供援助
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