I was about to leave my house________the phone rang.
| A．while | B．when | C．as | D．after |
Green products are becoming more and more popular because they are environmentally_______.
| A．friendly | B．various | C．common | D．changeable |
Heavy rainstorm broke out in South China,68 lives and 62 still missing.
| A．killing ,leaving | B．killing ,left | C．killed, leaving | D．to kill , leave |
Dr. Smith, together with his wife and daughters , visit Beijing this summer.
A is going to B are going to C was going to D were going to
The experiment shows that proper amounts of exercise, if regularly, can improve our health.
| A．being carried out | B．carrying out | C．carried out | D．to carry out |
Tell me how to operate the electronic computer, ______?
| A．will you | B．shan’t you | C．do you | D．don’t you |