Have you found your English book?—No, I haven’t found ________, but I borrowed ________ from Jack this afternoon.

He speaks English _____ an American, so we all think he stays in America for many years.[ ]

I find this Math problem very ______. I believe students can work it out ______.

Is that Kate’s car?–It ______be hers. She has just gone for a meeting.

My sister was very afraid all the way because it was the first time she ______ a car.