If you ________ smoke, please go outside because this is a non-smoking office．

must

should

can

may

－Who would you rather ________ your graduation ceremony tomorrow, your parents or friends?

－All of them．

will have attended

have attended

attended

to attend

In that school, English is compulsory for all students, but French and Russia are ________．

special

optional

regional

original

－Why didn't you come to the party?

－I had meant ________, but something unexpected happened．

so

that

not

to

We should discuss the plan ________ before we work it out．

in general

in detail

on time

on purpose

Mom used only half of the money, the rest of which ________ saved for other purposes．

is

are

was

were

As he reached ________ back door, Jack saw ________ strange sight．

the ;/

a; the

/; a

the ; a

Between the two parts of the concert is an interval, ________ the audience can buy ice-cream．

when

where

that

which

－Linda didn't invite us to the party．

－________?I don't care．

For what

So what

What's on

What's up

Someone is ringing the doorbell．Go and see _________．

who is he

who he is

who is it

who it is