Question

10. They could have attended the awarding ceremony,

but their flight     due to the bad weather.

A. was delayed       B. had been delayed

C.  has delayed     D.  was delaying

Answer 1

 10.   A 考査動(dòng)詞的時(shí)態(tài)和語(yǔ)態(tài)。根據(jù)句中的could have done 可知是對(duì)過(guò)去事情的推測(cè)，故用一般過(guò)去時(shí)。主語(yǔ)their flight與delay之間為被動(dòng)關(guān)系，故用被動(dòng)語(yǔ)態(tài)，句意：他們本可以參加頒獎(jiǎng)典禮的，但他們的航班由于天氣不好被延遲了。故選A。