Air pollution has become__________ than ever before. We must do something to stop it.
| A．serious | B．more serious |
| C．most serious | D．the most serious |
I have English and Maths more.
A. practise B. to practise C. to practising
Bill and his friends ______ in the park yesterday.They ____a barbecue together.
A. are…have B. were…have C. were…had
What can you see when there is a strong wind?
---I can see clouds______ quickly.
A. move B. moves C. moving
a book and two rulers on the desk.
A. There is B. Has C.There are
Chinese New Year is_____ the _____ day of the _____lunar month.
A.on…one…one
B. in…first…first
C. on…first…first