The young man ________ be slow, but at least he doesn't make any mistakes．

may

can

must

should

We've been looking for cheap houses but haven't found ________ we like．

one

other

it

that

The bill you sent me is incorrect, Sir, ________ it isn't the first time．

Worse still

On the contrary

For one thing

In all

He left the company last month, where he ________ for exactly three years．

worked

was working

has worked

had worked

Speaking of Tom, there are several things that are not easy to ________, say, his dishonesty．

put up with

put aside

get along with

build up

________ some teenagers don't realize is ________ difficult life can be after they get addicted to drugs．

That; how

That; what a

What; how

What; what a

Every ________ space on the wall was covered with pictures．

available

valuable

ordinary

comfortable

At weekends in Bengbu, you can often see many people ________ outside some restaurants, ________ to have dinners．

sit; wait

seated; waiting

seating; waiting

sitting; wait

Nowadays it is difficult for people to find ________ work everywhere because ________ economic situation is very serious．

不填；an

a; the

不填；the

a；不填;

Professor Robison is now an expert in this field．It is years of hard work ________ has made him what he is today．

that

which

when

what