The ____________man can carry some water every day.
| A．81-years-old | B．81-year old |
| C．81 years old | D．81-year-old |
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 |