We do not know how astronauts can ____ when they spend months in space without the protection of the atmosphere.
| A．get off | B．get up | C．get along | D．get in |
We found ________ necessary to protect the environment.
| A．it | B．this | C．that | D．what |
-Which would you like, rice or noodles? --_______is OK. I'm hungry.
| A．Either | B．Neither | C．Both | D．All |
I don't think it very expensive to buy a family computer here.
-- Really? I'll buy _______ next week.
| A．it | B．this | C．one | D．mine |
Lucy knew nothing about it ________ her sister told her.
| A．because | B．until | C．if | D．since |
He walked ________ fast for us ________catch up with.
| A．so, that | B．such, that | C．enough, to | D．too, to |