题干
Tom often me my English.
A：help; with
B：helps; with
C：help; does
D：helps; does
答案(点此获取答案解析）
B
Tom often me my English.
A：help; with
B：helps; with
C：help; does
D：helps; does
=Acos(
)的图象如图所示，
，则
=
