I _____ sooner but I didn’t know that they were waiting for me .
| A．had come | B．was coming | C．would come | D．would have come |
Mark was a student at this university from 1999 to 2003, ____ , he studied very hard and was made Chairman of the Students' Union.
| A．during which time | B．for which time |
| C．during whose time | D．by that time |
He is a student at Oxford University, ____for a degree in computer science.
| A．studied | B．studying |
| C．to have studied | D．to be studying |
The Smiths went to the country for the weekend as they ______ to the office.
| A．needn’t have gone | B．mustn’t go |
| C．may not go | D．didn’t have to go |
She thought I was praising her child，_____，in fact，I was scolding him for his bad behaviors at school.
| A．what | B．while | C．so that | D．therefore |
—Your mother becomes more and more forgetful.
—Yes. She searched for her cellphone for a whole day last Sunday but it ______ in her coatpocket the next day.
| A．turned out | B．turned on | C．turned over | D．turned up |