— Did the police ask the guard what happened?
— Yes, the guard told the police all _________ he knew.
A. which B. that C. what
Alice and I often study and play_____ table tennis together.
| A．a | B．an | C．the | D．/ |
My hair is too long. I want to get it _______.
| A．cut | B．to cut | C．cutting | D．cuts |
Teenagers ______ smoke in China.
| A．should be allowed to |
| B．Should not be allowed to |
| C．should be not allowed to |
| D．should not be allowed |
Chinese _____ by more and more people in the world now.
| A．is spoken | B．is speaking | C．speaks | D．spoke |
Many trees ________ two years ago.
| A．plant | B．planted |
| C．were planted | D．are planted |