Although she has a lot of problems, she manages to remain ________.
| A．optimistic | B．cautious | C．concerned | D．upset |
At present, one of the apartments in favor of the new airport ________ that it will going a lot jobs to the area. 
| A．is | B．are | C．will be | D．were |
It was _____ he came bank from Africa that wear _________ he met the girl he would like to marry. 
| A．when; then | B．not; until | C．not until; that | D．only; when |
The house I grew up ________ has been taken down and replaced by an office building. 
| A．in it | B．in | C．in that | D．in which |
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.（）
| A． |
/; the |
B． |
the; / |
C． |
an; the |
D． |
the; a |
According to statistics, a man is more than twice as likely to die of skin cancer _________ a woman.
| A．than | B．such | C．so | D．as |