B

products (n) :sản phẩm

for

in, of

to

Are-having

Is-writing

isn't instructing

Is-going to fly

are-doing, am doing

1 is teaching

2 are responding

3 is now working

4 is crying

5 are-always making

Vietnamese people have already broken some old customs

He spent half an hour explaining the rules of the games to the kids

Parents oblige the law of sending their childern to school

Driving a car is more similar than riding a motorrbike in some ways

The Earth is made of different layers, not just ball and solid rock

1 do-wash

2 gets

3 has

4 is

5 is

1 Do-have

2 doesn't do

3 is raining

4 Do-know, is

1 had looked

2 had run

3 had travelled

4 had worked

5 visited

1 because of

2 because of

3 because

4 because of

5 because

6 because

7 because of

8 because of

9 because of

10 because of

2 busier

3 more active

4 friendlier

5 more careful

6 more creative

7 more clever/ cleverer

8 kinder

9 more hard-working

10 funnier

11 noisier

12 more crowded