Scientists are working hard to make _______ possible for people to live on Mars in the future.
| A．it | B．that | C．this | D．one |
There is only_____ milk in the fridge.It’s not enough for all of us.
| A．a few | B．a little |
| C．little | D．few |
--_________ I finish my homework now,mum?
--No,you _______.But you must finish it before seven o’clock.
| A．Must,needn’t | B．May,mustn’t |
| C．Can,can’t | D．Need,must |
--___________do you clean the goldfish’s tank?
--Three times a week.
| A．How long | B．How often |
| C．How far | D．How soon |
--Can you play _______ piano?
--Yes. And my parents will buy me _______ piano this summer.
| A．a; the | B．\; the |
| C．the; the | D．the; a |
----I like talking on the Internet with my friends.
---- ______.
| A．Me too. | B．You are right. |
| C．Yes, I do | D．I enjoy. |