David， is that man your Chinese teacher— It ___________ be him. He’s having a meeting.

Those poor and needy teenagers were excited to find ashop at the corner where they could buy ____ priced bikes.

I hear you have to read English every morning.—Right. It’s one of the _____ in my family.

I think there will be ______tall buildings and there will be ____pollution in the future.

eter speaks in public, he always has trouble_ the right things to say.