1.(2009江苏苏州,7,中考）It is usually warm in my hometown in March,but it ( )be rather cold sometimes.
A.must B.can C.should D.would
2.(2007山东济南中考）This coat isn't yours.Whose ( ) it be?
A.can B.may C.must D.will
答案上说第一题选B,第二题选B,为什么?
can表推测时不是用在疑问句与否定句中吗?那为什么第一题在肯定句中用can?
may表推测时不是只能用在肯定句中吗?为什么第二题在疑问句中用may表推测?