343. What a pity!I missed meeting my boss at the airport because my car was ____ in the traffic jam.
A.broken up
B.kept back
C.held up
D.held back
344.What's the matter with Jason? He looks a bit upset.
Didn't you know? When he returned from his holiday last night,he found his house _______.
A.broken off
B.broken into
C.broken down
D.broken out
343.答案是C;此题表示“因交通拥挤而堵塞”,hold up被耽误/延误，符合题意。
344.答案是B;break off中断， 折断，突然停止;break into闯入，打断，突然中断;break down出故障，中断，分解；break out 突然发生，爆发。
