17. We read 10,206 like this:
A. one thousand, two hundred and six B. one thousand two hundred and six
C. ten thousand, two hundred and six D. ten thousand , two hundred , six
18. —Could I swim here, Mr. Yang?
—No, _____ . It’s dangerous to swim here.
A. you couldn’t B. I’m afraid you can’t C. that’s all right D. no problem
