题干
– Is that man Mr. Green?
– It _____ be him. He has gone to Paris on business.
A：may
B：must
C：can't
D：shouldn't
答案(点此获取答案解析）
C
– Is that man Mr. Green?
– It _____ be him. He has gone to Paris on business.
A：may
B：must
C：can't
D：shouldn't
＜2x＜4}，则集合M∩(CRN)等于（ ）