请教几道语法题

yankljUID: 2158457

The snapper, a large-headed fish (with) a long dorsal fin, is named (to) its characteristic way of (suddenly), shutting (its) mouth.
答案是选B.  应该怎么改啊?
Astronauts receive (extensive) training to prepare (themselves) (both) physically and psychologically (for complexity) and rigor of a space mission.
答案是选D..应该怎么改啊?

yanhuangbabyUID: 178305

1。to 改为  after
2。 加个the  ，其实这个我不确定，但我认为是这样

[ 本帖最后由 yanhuangbaby 于 2006-1-10 23:37 编辑 ]

xukai8273UID: 2165109

2   是不是把both去掉？

翦瞳UID: 184872

be named for 吧？