The boy used to cause a lot of _________/’tr?bl / very much.

—What do you think of the two backpacks? —______ of them are very nice.

–___   _ the population of China?–_______  over 1,300,000,000.

—Look at that girl!    —I think ___is Jenny.

— Is this Tommy’s suitcase?— No, it is not          . It is          .