问题
I can’t decide __________or not I should encourage my son to be a volunteer.— Why not It will make him more helpful.
A:if
B:whether
C:how
D:why;
B:whether
C:how
D:why;
正确答案是：
同类题型
His father was really a ____ person. Once he made up his mind, nothing could change it. [ ]
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We are very _______ that many students use theInternet every day.
Here is a new edition of Crazy English Do you wantto look at it— ______! Let me see it