There are two blackboards ______the wall and two doors ____the wall.
| A．on, on | B．on , in |
| C．in , on | D．in ,in |
---Listen! Helen is singing in the next room.
---It ____be her. She has gone to Beijing.
| A．can't | B．mustn't | C．may | D．should |
We ______ for a long time. Shall we play for a while?
| A．study | B．studied |
| C．have studied | D．are studying |
--Help! Help! There is a big snake(蛇) near the house.
---____afraid. It will go away later.
| A．Don’t | B．Not |
| C．Don’t be | D．Be |
---Mum, May I go out to play?
---Sure, If your homework ______, you may go out to play.
| A．finishes | B．finished |
| C．is finished | D．was finished |
The man who lived on the lonely island thought he would never______.
| A．found | B．finds |
| C．find | D．be found |