Do you know the professor in home we stayed?
| A．which | B．his | C．whose | D．whom |
I couldn’t do my homework with all that noise ________.
| A．going on | B．goes on | C．went on | D．to go on |
Not only ____________ vital for reducing fever and helping stop pain, but there are also other things that aspirin can help with.
| A．has aspirin proved | B．did aspirin prove |
| C．aspirin proved | D．had aspirin proved |
It was not until 1938 _________ the first colour TV programme was broadcast.
| A．which | B．that | C．when | D．on which |
You can borrow my car ________ you promise not to drive too fast.
| A．unless | B．even if | C．in case | D．as long as |
We were told not to touch the equipment in the laboratory unless ________.
| A．allowed to do | B．allowing to do | C．allowed to | D．allowing to |