My sister is only two years old, and I have to _____ her on Sunday.
| A．look for | B．look after |
| C．look like | D．look at |
---Do you think it will be fine tomorrow?
---_____________. It has rained for so many days.
| A．I hope not. | B．I am sure it will | C．I hope so | D．I’m afraid so |
It’s two and a half weeks since the exchange students __________ Wuxi.
| A．arrived | B．reached | C．have been in | D．have arrived in |
Little Tom has got a lot of birthday presents, but he isn’t able to take all of them ___.
| A．on time | B．at a time | C．at same time | D．from time to time |
We can have ___ blue sky if we create ___ less polluted world.
| A．a. a | B．a, the | C．the, a | D．the, the |
-----Did you notice him come in?
-----No. I _____ a football game.
| A．have watched | B．had watched | C．am watching | D．was watching |