单项填空
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
1. The child _____ parents were killed in the air crash is now living with his aunt．
A．whose B．his C．who D．whom
2. The film _______ for twenty minutes when they got to the cinema．
A．had already been on B．has already been on
C．had already begun D．has already begun
3. The noise _______ by the machine could be heard at night．
A．making B．made C．make D．to be made
