--- I hear that your good friend David ____________ books about history.--- Yes, but now he ____________ novels.
Our teacher was very happy because _____failed the examination.
Daniel, ___ play with the mobile phone while you're walking in the street.
--Do you have any plans for this summer vacation? --I'm not sure. I ___ take a trip to Taiwan.
TFBOYS' songs ____ sweet and many of us like listening to them.
--Jane, your new dress looks very nice you! --___. I like it very much.