Experts are trying to work out a solution to save the miners _____ its too late.
A. before
B. since
C. unless
D. when
参考答案:
— Anything else should we pay attention to if we go camping?..
— Anything else should we pay attention to if we go camping? — Nothing much.Just take a raincoat _____it rains.A. in case B. as if C. even if D. so that