Jim says we ______ stay in his house as long as we leave it clean and tidy .
A. must B. can C. need D. should
B
【解析】
【详解】考查情态动词。句意:吉姆说我们可以住在他的房子里,只要我们保持它干净整洁。A. must必须;B. can能,可以;C. need需要;D. should应该。根据后面的“as long as we leave it clean and tidy”可知,Jim许可我们待在他的房子里,即:我们”能,可以”待在他的房子里。故选B。