We regret to inform you that there are no tickets ________ for Friday's performance．

available

convenient

spare

free

Where was it ________ the road accident happened yesterday?

when

that

which

how

Bob is often late for work, and he is believed ________ sooner or later．

that he'll be fired

to have fired

to be fired

being fired

The success of this project ________ everyone making an effort．

relies on

cares for

reminds of

calls up

After his brother left school, he got employed in a construction company, and ________ there ever since．

worked

was worked

has worked

is working

Obviously what he said just now is a story of ________．In fact, a car can't reach that speed．

science

truth

fact

fiction

Modern farming methods can have ________ unpleasant effect on ________ environment．

an；不填

an; the

不填；an

an; an

Don't you consider it essential ________ enough practice before he takes part in the competition?

how he will receive

that he be received

if he will receive

that he receive

They Americans do a lot of business ________ lunch, while people here prefer to tell stories．

in

over

within

without

If you want to do the experiment a second time, you'd better be more careful ________ you made a mistake．

when

in case

where

unless