Some time after the rockets and the space shuttle are _____, the rocket will _____ the space shuttle and ____ the sea.

A．set sail; broadcast; drop in	B．ruled out; orbit; show up
C．stepped up; survive; fall for	D．launched; separate from; fall into

科目 英语   题型 单选题   难度 较易

知识点： 动词的辨析