I will have begun to do the work______ 3 0’clock this afternoon.
| A．by |
| B．at |
| C．after |
| D．before |
Being a parent is not always easy, and being the parent of a child with special needs often carries with ___ extra stress.
| A．it | B．them | C．one | D．him |
____ twice, the postman refused to deliver our letters unless we changed our dog.
| A．Being bitten | B．Bitten | C．Having bitten | D．To be bitten |
The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ___ 9-story building.
| A．the; the | B．a; a | C．a; the | D．the; a |
John was given the same suitcase his father and grandfather ___ with them to school.
| A．took | B．had taken | C．were taking | D．would take |
At first he hated the new job but decided to give himself a few months to see ___ it got any better.
| A．when | B．how | C．why | D．if |