When it air pollution, Beijing faces the three “C” s,cars,coal and construction,which lead to Beijing's thick air pollution.
Lack of money ________ her not continuing her studies.
You can hardly imagine the difficulty the woman had ________ her children.
—Can you believe I had to pay 30 dollars for a haircut? —You should try the barber’s I often go next time. It’s only 15.
The other day, my father drove his car down at ____ I thought was a dangerous speed.
____ is known to us all is that the old worker, for _____ life was hard in the past, still works hard in his seventies.