【题目】Don't cut in line ________ you're waiting for the bus or shopping.
A.whileB.unlessC.onceD.though
【题目】________ you make a promise, you should try to keep it. Or you'll lose others' trust.
A.UnlessB.BecauseC.BeforeD.Once
【题目】________ we finished drinking tea, we all sat on the grass.
A.WhenB.AfterC.BeforeD.If
【题目】Tom is only two years old, ________ he shouldn't be left alone.
A.andB.soC.butD.for
【题目】________ he has said sorry to you, please give him another chance.
A.WhenB.SinceC.BeforeD.Until
【题目】I am quite busy. I don't know ________ I'm free or not tonight.
A.ifB.unlessC.whetherD.when
【题目】My mother was cooking in the kitchen ________ I came home.
A.afterB.whileC.whenD.until
【题目】(2018邢台二模) You'd better bring a sweater ________ it is cold there in the evening.
A.unlessB.becauseC.whenD.if
【题目】(2018邢台二模) I bought my friend a birthday present, ________ he liked it very much.
A.orB.butC.andD.so
【题目】(2018承德双桥区一模) A tourist will easily lose his way in a new city ________ he has a map or a guide.
A.ifB.becauseC.unlessD.when