The Chinese students have_____weeks _____in the summer than American students.
He’s read this book before, _____?
Compared with last year, our pay _____ about ¥500 every month.
—Where are Maria and Kangkang?—They _____ England.
—David has made great progress recently.—_____, and _____.
—Is it interesting to play computer games?—Yes, _____ you are interested in playing computer games, you’ll have trouble giving it up.