– I have difficulty in learning English. I don’t know _______.
– Why not join an English club?
A. why to do B. what to do C. when to do
They don’t know what ___________ the problem .
| A．to do | B．do | C．to do with | D．do with |
Don’t try to do everything at once. Take it a bit _______________.
| A．at times | B．at a time |
| C．at all times | D．at that time |
We __________ obey the traffic rules.
| A．must | B．have to | C．may | D．can |
What a ________ rain ! It has rained ______ since last night.
| A．heavily heavy | B．heavy heavily |
| C．hardly hard | D．hard hardly |
—Andy finished first in the competition!
--- Really ? Sounds ________ to believe.
| A．too good | B．good enough |
| C．quite good | D．so good |