The boy helped the blind girl go ________ the road. The girl was thankful to him.

A.across B.below C.over D.through

Don't cut in line ________ you're waiting for the bus  or shopping.

A.while B.unless C.once D.though

________ you make a promise, you should try to keep it. Or you'll lose others' trust.

A.Unless B.Because C.Before D.Once

________ we finished drinking tea, we all sat on the grass.

A.When B.After C.Before D.If

Tom is only two years old, ________ he shouldn't be left alone.

A.and B.so C.but D.for

________ he has said sorry to you, please give him another chance.

A.When B.Since C.Before D.Until

Jane, please turn off the lights ________ you leave the classroom.

A.after B.before C.until D.unless

I am quite busy. I don't know ________ I'm free or not tonight.

A.if B.unless C.whether D.when

Put on your coat,      you will catch a cold.

A.and B.but

C.or D.so

Tommy, don't make a noise! ________ you have any questions, please put up your hands.

A.Before B.If C.Though D.Until