Be sure _______ when you enter the cave. Otherwise, you’ll hit your head on the rocks.
| A．to bend | B．bends | C．will bend | D．bending |
______ the blender. Let’s make some milk shake.
| A．Turn on | B．Turn off |
| C．Turn up | D．Turn down |
--Will there be money in 100 years?
-- ________. Everything will be free.
| A．Yes, there will | B．Yes, there is |
| C．No, there won’t | D．No, there isn’t |
Their school days are busy and the children don’t get home _____7 o’clock p.m.
| A．though | B．until |
| C．when | D．Since |
The little girl likes to _______ as an angel(天使), so she asks her mother to buy her lots of clothes.
| A．make up | B．take up |
| C．put up | D．dress up |
We all know trees play an important role in _______up the air.
| A．clean | B．cleaning |
| C．cleaned | D．Cleans |