题目内容
It is known that ________ of the land in the northwest of China is poor.
[ ]
What's ________ in Australia?
As it is know to all, Australia is ________ country.
A．the spoken language, an English-spoken
B．the language spoken , an English-speaking
C．the speaking language , an English spoken
D．an English spoken, the speaking tanuage
It is know to all that ________ you exercise regularly, you won't keep good health．
A．unless
B．whenever
C．although
D．if
It is know n to us ___________________________________（生命起源于何处）.
