Not until I came home last night ________ to bed.
| A．Mum did go | B．did Mum go |
| C．went Mum | D．Mum went |
I a report about the air pollution in my hometown all the morning and haven’t finished it yet.
| A．wrote | B．have been writing |
| C．was writing | D．have written |
It is I who going to have a trip to New York this summer.
| A．am | B．are | C．is | D．be |
I am determined to get a ticket for the concert it means standing in a line all night.
| A．now that | B．even if |
| C．as if | D．so that |
You have seen Helen in her office this morning because she’s been out of town for two weeks.
| A．needn’t | B．mustn’t |
| C．mightn’t | D．couldn’t |
in 1898, Beijing University is one of the top universities in China.
| A．Being founded | B．It was founded |
| C．Founded | D．Founding |