－The teacher asked, “Are you waiting for the bus?”

－The teacher asked ________ for the bus．

if I was waiting

was I waiting

you are waiting

I was waiting

He asked her, “Where are you going?”

He asked her ________．

where she were going

where she was going to

where she was going

where she is going

I was on the highway when this car went past followed by a police car．They ________ at least 150 kilometers an hour．

should have been doing

must have been doing

could have done

would have done

The construction of the two new railway lines ________ by now．

has completed

have completed

have been completed

has been completed

The father as well as his three children ________ skating on the frozen river every Sunday afternoon in winter．

is going

go

goes

are going

The company had about 20 notebook computers but only one-third ________ used regularly．Now we have 60 working all day long．

is

are

was

were

I just wonder ________ that makes him so excited．

why it does

what he does

how it is

what it is

The teachers usually dislike those boys who don’t show much ________．

practice

promise

fact

wish

Anyone who is caught ________ shall not pass the exam．

to cheat

cheating

to be cheating

cheated

The dog seemed very quiet, but I still dared not ________ to upset it．

to do a thing

do anything

to do something

do nothing