蓝OG的几道题麻烦大家看看！

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24.In the recent years cattle breeders have increasingly used crossbreading, in part that their steers should acquire certain characteristics and partly because crossbreading is said to provide  hybird vigor.

A. in part that their steers should acquire certain characteristics
BC就不打了
D.partly because certain characteristics should be acquired by their steers
E.partly to acquire certain characteristics in their steers.

DE应该怎么选呢？

33.The W study indicates that even after a decade young men and women still experience some of the effects of a divorce occuring when a child.
A.occuring when a child
B.occuring when children
C.that occurred when a child
D.that occurred when they were children
E.that has occurred as each was a child
这题不太明白怎么选的。

73.After suffering 一大笔钱 in losses and 25000 layoff, the nation's semiconductor industry, which makes chips that run everything from computers and spy satellites to dishwashers, appears to have made a long-awaited recovery.
答案就是原句。可是我想问的是D（computers and spy satellites to dishwashers, apppears that it has)解释说appears that it has这种用法不对，可以帮我解释得更详细点吗？