The existence of different kinds of animals and plants which make a balanced environment is called........

When I came through the customs at the airport, I had to pay ____ on a clock I had bought.

How many _______are there in a week?

The rainbow _______ as the sun came fully out from behind the clouds.

She heated the chocolate until it ______ , then poured it over the cake.

 Many of the earliest _____ into the United States established large plantations.

They haven’t kept in touch with each other ………………

He was _______ when I had those problems and said whatever I did he would stand by me.

We couldn’t cut the string because the ______ of the knife was not sharp enough.

 The Alps are one of the best-known mountains ________ in Europe.

Lawyers often make higher _____ for their work than they should.

The last week of classes is always very busy because students are taking examinations, making applications to the University, and extending their visas. (Mark the letter A, B, C, or D to indicate the word or phrase that is CLOSEST in meaning to the underlined part in each of the following questions.)

Lan often spends two hours________________ her homework everyday.

As a result of their ______ the three small independent countries felt less afraid of their powerful neighbour.

We suddenly saw the bus about to leave and had to run ______ to catch it.

The computer allows us to work fast and _______.

Few businesses are flourishing in the present economic climate.

He’s always ______ to his father’s wishes.

Affected by the Western cultures, Vietnamese young people's attitudes _______ love and marriage have dramatically changed.

You can _____ your shorthand ability by taking notes in shorthand during lectures.

 I dislike going to the dentist as he uses the ______ on my teeth.