12. _______to zoos in Beijing and other cities, the elephants are reported _______well. I'm glad to

Question

A. Having been sent, to settle B. Sent, to have settled down C. Sent, to be settled D. Being sent, to have settled选那一项，是不是Having been sent；to have settled down比较合适，关键是第二个空用不用被动

Answer 1

having
been
done
和done作状语用时，基本上可以换用，都表示被动和完成。
当状语中有表示一段时间或次数的词时，就只能用现分的完成
被动式
，不用过分。
选择B，也能用：Having
been
sent；to
have
settled
down
settle
down是个
不及物动词
词组，不用被动。