Although medical science________control over several dangerous diseases，what worries us is that some of them are recurrent.

A．achieved B．has achieved

C．will achieve D．had achieved

When he turned professional at the age of 11，Mike________to become a world champion by his coach and parents.

A．expected B．was expecting

C．was expected D．would he expected

It was the third time this term that the teacher________with the naughty student.

A．had talked B．have talked C．talked D．talk

He________Beijing，so he knows a lot about it.

A．has gone to B．has been to

C．went to D．goes to

—Look！How long________like this?

—Three weeks! It's usual here that rain________without

　stopping these days of the year.

A．has it rained；pours B．has it been raining；pours

C．is it raining；is pouring D．does train；pours

—Isn't it hard to drive downtown to work?

—Yes，that's why I________to work by train.

A．have been going B．have gone

C．was going D．will have gone

This is the best dinner that I________.

A．enjoyed B．have enjoyed

C．had enjoyed D．enjoy

I'll return the book to the library as soon as I________it.

A．will finish B．am going to finish

C．finished D．have finished

—Why don't you go home?

—Because a lot of work________yet.

A．hasn't finished B．hasn't been finished

C．has been finished D．haven't finished

Progress ________ so far very good and we are sure that the work will be finished on time.

A．was B．had been C．has been D．will be