Is Sam taller than John？–No. Sam is not_________ him.

May I use your pen Mine is broken.— Of course, here are two and you can use ________ ofthem.

The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?–________ my students have a try?

Do your parents often watch TV at home— No. We _______ like reading books.

Great changes ______ in the past few years, anda lot of factories ________.