The public transportation is very convenient in that big city, so there ________ be any difficulty in traveling around.

Can those ____ at the back of the classroom hear me—No problem.

She didn’t mention her troubles to Mr Li，who might have helped her ______

With all the books he was interested in _______, he left the library and went back to his dorm.

I’m sorry I ___ my exercise book at home just now.–Don’t forget_____ it to school tomorrow, please.