Study must ____ every dayA come first B comes first C first come 选择一个答案,^0^……谢谢各位恩人……
问题描述：
Study must ____ every day
A come first B comes first C first come
选择一个答案,
^0^……谢谢各位恩人……
答
a
must 后面接动词原型
答
A