问题
选择题
--Who has opened the door? ---I think it __ be Lin Tao. He’s always the first to get here.
A．is able to
B．can't
C．must
D．mustn’t
答案
答案：C
这是肯定的推测, 所以只能选用must
搜题请搜索小程序“爱下问搜题”
--Who has opened the door? ---I think it __ be Lin Tao. He’s always the first to get here.
A．is able to
B．can't
C．must
D．mustn’t
答案：C
这是肯定的推测, 所以只能选用must