(2013·四川省六校二模)Jack is an outgoing child, usually kind and helpful, but he lose temper sometimes.
A. must
B. would
C. can
D. should
网友回答
A. must
B. would
(答案→)C. can
D. should
解析：选C 考查情态动词。句意：杰克是个外向的孩子，平时很善良且乐于助人，但有时他也可能会发脾气。此处需要一个表示可能性的情态动词，只有can符合句意。