E-mail as well as telephone, ________ an important part in daily communication．

A．is playing

B．have played

C．are playing

D．play

There ________ a lot of rubbish on the floor so I asked Mary to sweep ________ up．

A．were, it

B．are, them

C．was, it

D．is, them

All but the lazy boy ________ on time ________ class．

A．was, for

B．were, for

C．was, to

D．were, to

Not only China but also other countries ________ trying to develop their own economy．

A．is

B．are

C．has

D．be

There are a knife and fork ________ on the table．

A．seems to be

B．seem to be

C．seems to have

D．seem to have

If law and order ________, neither the citizen nor his family ________ safe．

A．are not preserved, are

B．is not preserved, is

C．were not preserved, were

D．have not preserved, is

The whole family ________ TV attentively．

A．are watching

B．is watching

C．is seeing

D．are seeing

What the children in the mountain village need ________ good books．

A．is

B．are

C．have

D．has

Both rice and wheat ________ grown in our country．

A．is

B．are

C．was

D．have

A perfect gift with many flowers ________ to the beautiful girl．

A．is sent

B．are sent

C．has sent

D．has been sent