语法与词汇 They have passed through their most difficult time, and now they are enjoying their business _____.无
【正确答案】 A
【答案解析】句意： 他们已经度过了最困难的时期， 现在他们正享受着自己的商业繁荣。 boom繁荣。 contact接触。 decay衰退。 flash闪光。 因此选A。