How about the pollution in the countryside?－Luckily, it’s not as serious as _______ in the big cities.

Dinner is ready. Help yourself! — Wow! It delicious. Could you please tell me how to cook it?

This is the city _____ I visited 10 years ago.[ ]

What color is ________ pencil?—It’s red.

My grandfather lives ______. He sometimes feels ______. We should often go to see him.