In China it is quite(nature)______for people to go back home for the SpringFestival.

Nowhere in nature is aluminum found free, owing to its always ______ with other elements,

______ is quite difficult for Mary to pass the interview.A．WhatB．ThisC．ThatD．It

Natural gas is used in Bremo to heat water because______.A．it produces more steamB．it caus

In China, when someone gives you a present, it’s thought impolite to open it ______.A

______ is well-known the environment in China is badly in need of improvement.A. It B

Wherever you go in China it is a common sight that people ___