完成句子.1.The bridge__(完工）by the end of this year.(complete)

1. will be completed
2.has married
3.has set up (PS:我认为建起来应该是set up，如果错了就告诉我一声哦……)
4.It has rained （PS：此句为陈述句，故楼上的答案不太准确。）
5.this song is being played （这个答案应该是唯一的，应为现在进行时的被动语态。意为：这首歌正在被放。）
6.has been held （应为现在完成时的被动语态，and连接的前后句时态一致。）
7.has been studying（应为现在完成进行时。表明动作从过去延续至今，并仍在持续。）
8.was playing
9.passed
10.leave
11.won
12.if he comes tomorrow
13.was writing a letter（应表明在写信，writing不明确）
14.will be carefully discussed （discussed 是动词，应用副词carefully修饰）
15.haven't finished reading （主语是I，故动词用原型）
16.was driving
17.has gone to
18.weren't allowed
19.have made （主语为they，谓语动词用原型）
20.must be found

同楼上不同的答案我都一一作了解释。有不懂得再问我吧^-^

1. will be completed
2.has married
3.has set
4.how long has it rained
5.this song is been playing/this song is playing
6.has held
7.has studied
8.was playing
9.passed
10.leave
11.won
12.if he comes tomorrow
13.was writing
14.will be careful discussed
15.hasn't finished reading
16.was driving
17.has gone to
18.weren't allowed
19.has made
20.must be found