Question

if you cousin started at 6 o'clock in the morning, i am sure he ________ be there by now.

A.may B.will C.can D.must

Answer 1

选B。be sure已经表明肯定的意思了，只要用will 陈述这个事实就足够了。
A翻译成“可能”，不恰当，C表示“能力”，D具粗橘有主观上的强制性咐让。岩简团都不合适。so,选B。