OG12 2nd. SC 24 和 48题 不是很明白

xdai555

24.In recent years cattle breeders have increasingly used crossbreed, in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor.
d. partly because certain characteristics should be acquired by their steers

e.  partly to acquire certain characteristics in their steers

答案e.  可是我觉得d比较对称 虽然解释说这被动用的很奇怪。。 是不是说 用主动语态比平行更重要？？

48. Reporting that one of its many problems had been the recent extended sales slump in woman’s apparel, the seven-store retailer said it would start a three-month liquidation sale in all of its stores.

b. its many problems had been the recently (我把has改成了had 就是想问 recent和 recently)

为什么这里recently 不是修饰 extended. 怎么看的出来应该用recent 修饰sales 还是 recently 修饰extended. 能给2个不同例子吗？ 谢谢