UC知道帮忙解这几个英语选择题谢谢了..
来源：百度知道 编辑：UC知道 时间：2024/05/14 09:33:18
23. The modern technology to shrink(缩短) the distances of runways which large and fast aircraft use.
a.has begun b. have begun
c. began d. had begun
答案是a
12. Once you the brand of whisky, you will never want to drink any other.
a. drunk b. have drunk c. will drink d. drank
答案是B
17. He was disappointed that all of the guests when he at the party.
a. left, had arrived b. left, arrived
c. had left, had arrived d. had left, arrived
答案：d
18. How long you the army till now?
a. did, join b. have, joined
c. have, been d. have, served in
答案D
–Nancy is not coming tonight.
--But she !
A. promises B. promised
C. will promise D. had promised
答案是B
..为什么啊- -..告诉我谢谢
a.has begun b. have begun
c. began d. had begun
答案是a
12. Once you the brand of whisky, you will never want to drink any other.
a. drunk b. have drunk c. will drink d. drank
答案是B
17. He was disappointed that all of the guests when he at the party.
a. left, had arrived b. left, arrived
c. had left, had arrived d. had left, arrived
答案：d
18. How long you the army till now?
a. did, join b. have, joined
c. have, been d. have, served in
答案D
–Nancy is not coming tonight.
--But she !
A. promises B. promised
C. will promise D. had promised
答案是B
..为什么啊- -..告诉我谢谢
23、定语从句前后时态应该一致，根据前文主语，应选择第三人称单数形势的谓语。
12、once引导的从句，主句是将来时，从句用现在是，包括一般现在时、现在完成时等。
17、“他到时客人们都走了”，客人走在前，他到在后。整个句子都是过去时态，所以前面过去完成，后面一般过去。
18、till now提问一个时间段，所以问句应是时间段。join是点动词，been+in才对。
最后一题：Nancy没来，但是她答应了（要来）。已经答应了，所以应该过去时或者完成时。