－Wait for me when you arrive．

－________．

A．I must

B．I will

C．I should

D．I can

He ________ to make himself ________, but the foreigner just couldn't catch what he said．

A．tried; understand

B．managed; understood

C．managed; understand

D．tried; understood

Films of this type ________ obvious features．

A．have

B．has

C．is

D．are

I feel that one of my main duties ________ a teacher is to help the students to become better learners．

A．for

B．by

C．as

D．with

Someone called me up in the middle of the night, but they hung up ________ I could answer the phone．

A．as

B．since

C．until

D．before

Have you been to Shanghai, ________ I left three years ago?

A．that

B．which

C．in which

D．when

This dining hall is ________ with students．

A．satisfied

B．popular

C．angry

D．familar

________ you want to remember its usage, you'd better make a sentence with the new word．

A．Unless

B．While

C．Now that

D．Even if

My uncle ________ for Qingdao tomorrow．I've got to know when the train ________．

A．leaves; starts

B．will leave; is to start

C．is leaving; is starting

D．is leaving; starts

Children shouldn't go swimming in the river ________ they are with their parents．

A．until

B．unless

C．if not

D．before