There are many people downstairs. What do you think ______?

Mom, Where are my keys? Do you know?— I _____ they’re in your schoolbag.

The TV is too ______. Let’s go fishing in the park.—- That’s a good idea.

Is the modern racing car outside ______, Lucia? –Of course not. Nobody but Jim can afford such an expensive car. It must belong to ______.

I ______ my mind to study harder since I visited the Shanghai Supercomputer Centre.