问题
You shouldn’t accept a lift from a person ________ you don’t know him.
A:until
B:unless
C:if
D:whether;
B:unless
C:if
D:whether;
正确答案是：
同类题型
My oil ________.I have to go to the gas station and add some before I’ve none in hand
Have you seen your nephew lately? —— Yes, in fact, I saw him yesterdayI ______ him for three years
English is a language ______ in manycountries
It will be less than a fortnight_______ we get to a turningpoint in our life