—Do you know about the accident which happened in the center of the city?
—Yes. But it was some time we realized the truth.
| A．before | B．when | C．since | D．until |
My parents _____ in Hong Kong. They were born there and have never lived anywhere else.
| A．live | B．lived | C．were living | D．will live |
I'm trying to break the of getting up too late .
| A． | tradition | B． | convenience | C． | habit | D． | leisure |
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 |