My sister ______ go to bed _______ my mother came back last night.
| A．not until | B．doesn't; until | C．didn't; until | D．aren't; until |
The fridge is environmentally friendly ________ it uses less electricity.
| A． |
because |
B． |
until |
C． |
before |
D． |
though |
We should look forward to the future, ________ never forget the past.
| A． |
or |
B． |
so |
C． |
but |
D． |
for |
The manager asked his secretary ________ the report before Friday.
| A． |
finish |
B． |
finishes |
C． |
finishing |
D． |
to finish |
Michael and his friends practise ________ table tennis after school every day.
| A． |
play |
B． |
played |
C． |
playing |
D． |
to play |
The headmaster is not available now. He ________ to the new teachers.
| A． |
speaks |
B． |
spoke |
C． |
is speaking |
D． |
was speaking |