---Do the Smiths live next door to you?
---No, but they _________.
A．used to B．used to do C．are used to D．used to be
— ______ go to the theatre together with me?
— Good idea!
A．How about B．Why do you C．Why not D．What about
–– When did they arrive?
–– They ______two hours ago .They ______ here for two hours .
A．arrived; have arrived B．arrived; have been
C．got; have been D．reached; have reached
----It’s important_____ a foreign language.
----I agree with you. We should study hard.
A．of us to learn B．for us to learn C．of us learning D．for us learning
I ______ to think their jobs were ______ .
A．used; bored B．am used; boring C．am used; bored D．used; boring
The maths problem is ______ hard for us ______ solve.
A．so, to B．so, that C．too, to D．very, to
