Supply the correct form of these adjectives:

1.           The Mekong River is the …………………._ river in Vietnam. (long)

2.           Tokyo is …………………. than London. (big)

3.           Ho Chi Minh city is the………………….city in Vietnam. (big)

4.           Petronas Twin Towers is………………….than Sears Tower. (tall)

5.           My sister is …………………. than I. (old)

6.           Nam is………………….than Ba. He is the ………………_ boy in Vietnam. (short)

7.           Phanxipang is the …………………. mountain in Vietnam. (high)

8.           These books are …………………. than those books. (thick)

9.           It is the………………….building in this city. (tall)

10.       The Nile River is …………………. than the Amazon River. (long)