—— Bob looks very blue. What has happened to him?—— Perhaps his failure in the exam _____ his low spirits. A accounts for B looks for C makes for D takes for
No one __________ be more generous; he has a heart of gold.
-Why are your eyes so red? You __________ have slept well last night. -Yeah, I stayed up late writing a report.
Harry is feeling uncomfortable. He __________ too much at the party last night.
When I was a child, I __________ watch TV whenever I wanted to.
Since nobody gave him any help, he __________ have done the research on his own.