有几个英语问题，请大家帮忙，谢谢啦！！

Question

1.adhere to和cling to的用法有什么区别？

2.请翻译一下：
The pursuit of leisure on the part of the employees will certainly not further their prospect of promotion.

3.____ energy under the earth must be released in one form or another,for example,an earthquake.
A.Accumulated B.Gathered C.Assembled D.Collected
此题为何要选“A”，用法有什么区别吗？

4.The second book was ____by August 1952,but two years later the end was nowhere in sight.
A.completed B. to have completed C.to complete D.to have been completed
此题为何选“D”而不选“C”

Answer 1

区别不大，都可以表示贴，遵守。
在职员这里对休闲的追求当然不能提高他们在升职上的预期。
B更多指人。其他意思都不对。
by是完成时的标志。