问题

It is widely known that burning coal for electricity is one of the main causes for global warming , but we can’t ignore the cars’ _____ to the greenhouse effect.

A:devotion
B:contribution
C:attraction
D:reflection;

正确答案是：

同类题型

He speaks English as fluently as if he__________an Englishman.

Energy, passion and a burning desire are, you see, ________ true learning takes

Two years has passed since I _____ you the first time.

of the good results of the exam, the teacherfelt very happy.

Alice,do you know tomorrow(2014威海)