常用涂料中，具有良好耐碱性能的涂料有()。

—Do I have to get up very early tomorrow？

—No, you______.

A．don't need B．shouldn't C．needn't D．don't have

“You can’t join us today ,can you？"“_____."

A.Yes,I can join you tomorrow

B.Yes,I can’t join you tomorrow

C.No, but I can join you tomorrow

D.No,I can join you tomorrow

I _______ to catch the early train, but I didn’t get up in time.

A、managed

B、intended

C、tended

D、failed

Don't lose heart. It will not be long ______ you catch up with others.

A．since

B．until

C．when

D．before

A. and

B.or

C.but

D.since

Don't put off till tomorrow ______ you can do today.A.thatB.what C.when D.whether

Don't put off till tomorrow ______ you can do today.

A．that

B．what

C．when

D．whether

Don't put off till tomorrow ______ you can do today.

A．that

B．what

C．when

D．whether

Don't put off till tomorrow ______ you can do today.

A．that

B．what

C．when

D．whether

______ you're early you can't be sure of getting a seat.

A．If

B．Unless

C．When

D．Because