Do you think he will do me a favor? — As far as I know, he is the last one to help others. He______be prepared to give you a hand, though.

Daniel，why are you so late? We _______ you would be here an hour ago— SorryI ________ know you were all here

Mr. Green asked us to stop____. So we stopped______to him at once.

Which is __________, traveling by air or by train

I was surprised by her words, which made me recognize ________ silly mistakes I had made.