Bad performances in the exams are closely connected with a ____ of exercise.

Can you find out our city _________ a lot in the last few years—Yes. The road is wider and the buildings are taller.

This must be a footprint of a tiger. — It ____ be. A tiger’s should be much larger and deeper than this.

It is this kind of exciting trip _____most of my classmates only dream about.

Have you ever traveled abroad—Sure. Iina small town in the USA with my grandparents.