You must be careful when ___ on the highway.
| A．you driving | B．are driving | C．driving | D．you were driving |
Tom is the firsthe is wrong.
| A．admit | B．to admit | C．of admitting | D．for admitting |
Every possible meansto prevent the air pollution, but the sky is not still clear.
| A．is used | B．are used | C．has been used | D．have been used |
，the wind died down and people began to appear on the street.
| A．A bit less | B．Little by little | C．A little bit | D．Not a little |
The number of the workers in this factory300, that is to say,
it20%.
| A．has increased by; has increased to |
| B．have increased to; have increased by |
| C．has increased to; has increased by |
| D．have increased by; have increased to |
A poet and artistcoming to speak to us about Chinese painting tomorrow afternoon.
| A．is | B．are | C．was | D．were |