问题
选择题
Her brother be at home now, because he was seen playing basketball in the stadium just now.
A.mustn’t
B.needn’t
C.can’t
D.shouldn’t
答案
答案:C
考查情态动词。句意为他的哥哥现在不可能在家,因为他刚才在体育馆打篮球。can 表示推测时,主要用于否定句和疑问句中。所以选C。