A. taking B. having been taken C. taken D. being taken
单项选择题Two middle-aged passengers fell into the sea.() , neither of them could swim.
A. In fact B. Luckily C. Naturally D. Unfortunately
单项选择题Some of the students have already learned enough English to()a conversation with a native English speaker.
A. carry on B. keep on C. go on D. hold on
