____ difficult the task may be, we will try ourbest to complete it in time.

shan Mountain, occupying an area of302 square kilometers, possesses rich cultural and geological __________

My father prefers taking a subway to driving his own car. Because the petrol is very expensive.

acts, scientists have thatmore energy is being absorbed from the sun, throwing the earth’s energy “out ofbalance”.

The car ____ at the present speed until it reaches the foot of the mountain at about nine o’clock tonight