As a teenager，our son should have two or three hobbies to be really happy—________，but how can he afford the time with so much homework every day

The maths teacher told the naughty boys _____ so much noise in class.

I didn’t do well in the last English test.How about you? 　　—_______.

Hello! Is that Tom over there Long time no see. Let’s say hello to him.—Please _____ in the library.

thecity’spublicschoolsystemshouldbeopentothechildrenofmigrantworkershas become the focus of discussion.