When it______ air pollution, Beijing faces the three “C” s-----cars，coal and construction，which lead to Beijing's thick air pollution.
| A．refers to | B．comes to | C．happens to | D．speaks to |
______the importance of education, the villagers paid more attention to the schooling of the children.
| A．Realized | B．To realize | C．Realize | D．Having realized |
_____wild animals when you go up the hill.
| A．Look out for | B．Take care | C．Take care of | D．Be careful |
The picture I took in the countryside ______ me of the time when I stayed there.
| A．remembers | B．reminds | C．calls | D．tells |
I ____him to give up smoking, but I failed.
| A．preferred | B．hoped | C．advised | D．suggested |
Healthy food should _____some fat, some fibre, a little salt and so on.
| A．contain | B．include | C．be | D．have had |