One of the responsibilities of the Coast Guard is to make sure that all ships_____follow traffic rules in busy harbors.

A. cautiously     B. dutifully     C. faithfully     D. skillfully

上期答案

It was no____that his car was seen near the bank at the time of the robbery.
A. coincidence     B. convention     C. certainty     D. complication

分析：coincidence   一致，同时存在   convention 大会，协定，习俗
certainty 肯定  complication 复杂化
选：A  发生银行抢劫时他的车子不在那附近