－Are you sure ________ the door before you left?

－Mum, not surely．We’d better go back to have a look．

of locking

to lock

to have locked

have locked

People try to avoid public transportation delays by using their own cars and this ________ creates further problems．

in short

in case

in doubt

in turn

Emergency line operators must always ________ calm and make sure that they get all the information they need to help．

grow

appear

become

stay

I like ________ color of your skirt．It is ________ good match for your blouse．

a; the

a; a

the; a

the; the

－The possibility of a flood was just reported over the radio．

－I know．I heard about it．The river ________ the top of its bank．

reached

reaches

would have reached

has reached

With a covering of ice in the plastic ice box, the fish will ________ fresh overnight．

stay

be stayed

have kept

be staying

We hadn’t planned to meet．We met ________ chance．

of

in

for

by

The poor young man is ready to accept ________ help he can get．

whichever

however

whatever

whenever

－Could you send me an application for the TOEFL test?

－________．What’s your name and address?

Yes, I could

Just a moment

That’s right

No problem

He got well-prepared for the job interview, for he couldn’t risk ________ the good opportunity．

to lose

losing

to be lost

being lost