It is reported that 40 percent of the land in Brazil________covered with trees.

—What's that terrible noise?—The neighbors ________ for a party.

When I met him the other day，it was the first time we ________ each other since we were at school. 

The country life he was used to________greatly since 2002.

—Have you known Dr. Jackson for a long time?—Yes，since she ________ the Chinese  Society.  

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

—Why don't you go home?—Because a lot of work________yet.

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

This is the best dinner that I________.

—Isn't it hard to drive downtown to work?—Yes，that's why I________to work by train.

—Look！How long________like this?—Three weeks! It's usual here that rain________without 　stopping these days of the year.

He________Beijing，so he knows a lot about it.

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

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

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

 The hotel wanted to charge $150 for the room service, but we couldn't ____________ to live in such an expensive hotel.

—What a mistake!—Yes. I________his doing it another way, but without 　success.

When I met him the other day，it was the first time we________each other since we were at school.

He________his leg when he________in a football match against another school.

—We all had a lot of fun at the barbecue yesterday. Pity you weren't there.—I really should have gone with you but I________on some remaining problems.