问题

Though most people know that smoking __________ the risk of cancer, it is still hard for them to give it up. [ ]

A: multiplies
B: adds
C: combines
D: gains

正确答案是：

同类题型

I used to live near the People’s Park　　　　is the centre of town.

Moscow is in．

Many experts agree that once thesetreasures are _______ to the air, great harm will be done to them. So theythink it better not to unearth the treasures.

Hello! What _______this

Peterlikespopmusic,but______hisfather______hismotherlikesit.