After his journey from abroad, Richard Johns returned home, ________．

A．exhausting

B．exhausted

C．being exhausted

D．having exhausted

David had promised me to come to the meeting and ________．

A．so did he

B．so he would

C．so would he

D．so he did

Selecting a mobile phone is no easy task because technology ________ so rapidly．

A．is changing

B．has changed

C．will have changed

D．will change

－Where can I get your new novel?

－I'm sorry, but it ________ and will soon come out．

A．has printed

B．has been printing

C．is printed

D．is being printed

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

A．is going

B．go

C．goes

D．are going

Always read the ________ on the bottle carefully and take the right amount of medicine．

A．explanations

B．instructions

C．descriptions

D．introductions

Although the causes of cancer ________, we do not yet have any practical way to prevent it．

A．are being uncovered

B．have been uncovering

C．are uncovering

D．have uncovered

I have to go to work by taxi because my car ________ at the garage．

A．will be repaired

B．is repaired

C．is being repaired

D．has been repaired

As you can see, the number of cars on our roads ________ rising these days．

A．was keeping

B．keep

C．keeps

D．were keeping

－It's burning hot today, isn't it?

－Yes．________ yesterday．

A．So was it

B．So it was

C．So it is

D．So is it