Did you call the airline to your flight booking? —Yes, I did.

so tired, working all morning on thefarm.— Why not take a rest , then— ____.

The first textbook written for teaching English as a foreign language________in the 16th century. [ ]

________ your calculations are correct, we should travel northeast.[ ]

下列各句中加横线词语的使用，不正确的一项是（ ）