The train was to arrive at 11:30 but it was an hour late.A. about B. likelyC. certainD. s

问题补充：

The train was to arrive at 11:30,but it was an hour late.

A. about

B. likely

C. certain

D. supposed

答案：

A. about

B. likely

C. certain

(答案→)D. supposed

解析：考查固定词组。Be supposed to do sth应该做某事；be likely to do sth可能做某事；be about to do sth马上就要做某事；句意：火车本应该在11点30到达，但是晚到了一个小时。故D正确。