________ you didn't know the rules won't be an excuse for your failure to report.
| A．That | B．Where | C．What | D．Why |
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 |
If you cannot have a good command of grammar as well as precise usage of each word you’ve learnt, it is ________ for you to use English flexibly.
| A．out of trouble | B．out of habit |
| C．out of the limit | D．out of question |
A new study of HIV-infected people in Haiti indicates that starｔing treatment early could save many patients who might _______ die of AIDS.
| A．somehow | B．anyway | C．therefore | D．otherwise |