It was in the lab __________was in the charge of Professor Smith __________they carried out the experiment.
| A．where；that | B．which；where | C．that；where | D．which；that |
It is required that the students mobile phones in their school, so seldom them using one.
| A．should not use; you will see | B．don't use; will you see |
| C．not use; will you see | D．not use; you will see |
— Could you please wait for a while? 
— . I'm not in a hurry.
| A．Leave me alone | B．Take your time |
| C．Do as you like | D．You're welcome |
. Our club, which I mentioned just now, is open to all, age or sex.
| A．instead of | B．in place of | C．in case of | D．regardless of |
He kept smiling secretly and we were all wondering that made him so happy.
| A．how it did | B．what he did |
| C．how it was | D．what it was |
. After the terrorist attack last month, anyone at the airport heavy bags, bottles of liquid, or whatever, could be stopped and questioned by the police.
| A．seen carrying | B．seen carry |
| C．seen to carry | D．seen to be carrying |