He didn't realize he had forgot his bag _____ the plane had taken off.
| A．unless | B．until | C．if | D．or |
.________that we should look after the three dogs three times, my mother left home.
| A．Mentioning | B．Having been mentioned |
| C．Having mentioned | D．Mentioned |
He was so deep in thought, thinking of the problem ________he knocked into the tree without noticing it.
| A．when | B．while | C．because | D．that |
He didn’t put the things ________they belonged, for_______he got his punishment.
| A．which; that | B．what; this |
| C．that; whose | D．where; which |
With the decision _____, the members present at the meeting were dismissed.
| A．to make | B．to be made |
| C．made | D．having made |
. —Let’s hurry. The film is beginning.
—Oh, I was afraid that the beginning_________.
| A．is already missed | B．will be missed |
| C．has already been missed | D．had already been missed |