--Must I turn off the gas after cooking?
--Of course. You can never be ________ careful with that.
| A．enough | B．too | C．so | D．very |
When to go for the on-salary holiday yet?
| A．are not decided | B．have not been decided | C．is not being decided | D．has not been decided |
I have got four day's holiday to Paris. I _______ my father.
| A．am taking | B．had taken | C．took | D．have taken |
---- I wonderyou will water this kind of flower.
---- Every other day.
| A．how often | B．how long | C．how sooner | D．how much |
Tom is good a studenthe is often praised by the teacher.
| A．such; as | B．so; as | C．such; that | D．so; that |
The girlis singing an English song in the next room is Tom’s sister.
| A．whom | B．which | C．whose | D．who |