_____ smoking, he would not have got cancer in the lung.
| A．Was he given up | B．Had he given up |
| C．Did he give | D．If he gave up |
He hid himself behind the door _____ he still could see what would happen to his classmates.
| A．there | B．which | C．from which | D．from where |
Do you have any idea of the reason _____ he referred to？
| A．that | B．where | C．why | D．when |
They stayed up until midnight _____ the old year out and the new year in.
| A．and saw | B．to see | C．seeing | D．for seeing |
If the car won’t start, _____ it.
| A．try push | B．try pushing | C．to try pushing | D．to try to push |
“Which sweater is yours?” “The one _______ No. 9.”
| A．that marked | B．was marked with | C．which marked | D．marked with |