【题目】--- Difficulties always go with me!
--- Cheer up! If God closes door in front of you, there be a window opened for you.
A. must B. would
C. could D. can
在线课程【答案】A
【解析】
考查情态动词辨析。句意：---困难总是伴随着我！---高兴点! 如果上帝在你面前关上了门，一定有一扇窗户为你打开。A. must必须；B. would将要；C. could可能 ;D. can将要。must表示对现在的状态推测时，意为一定，表示可能性很大的推测。符合句意。故A选项正确