【A】1.The latest data put forward by the states suggested that the business _____ improving.
A.was B.be C.being D.should
【C】2.----How is your tour around the North Lake?Is it beautiful?
----It ____ be,but it is now heavily polluted.
A.will B.would C.should D.must
【A】3.We ______ have proved great adventures,but we have done the greatest march ever made in the past ten years.
A.needn't B.may not C.shouldn't D.mustn't
【C】4.He _____ have attended the concert,for he knew nothing about it.
A.shouldn't B.mustn't C.couldn't D.needn't