—________ you interrupt now? Can't you see I'm on the phone?
—Sorry Sir, but it's urgent.
| A．Can | B．Should |
| C．Must | D．Would |
It wasn’t until nearly a month later ____ I received the manager’s reply.
| A．since | B．when | C．as | D．that |
As is known to all language learners, the newly learnt words will soon be forgotten unless______ used in everyday communication.
| A．gradually | B．loosely | C．exactly | D．frequently |
The child asked his mother _______ go out to play tennis.
| A．that he could | B．if could he | C．if he could | D．that could he |
When changing lanes, a driver should use his turning signal to let other drivers know _______.
| A．he is entering which lane | B．which lane he is entering |
| C．is he entering which lane | D．which lane is he entering |
After dinner they talked about the persons and things _______ they still remembered.
| A．which | B．that | C．who | D．what |