_____ your help, I passed the exam. [ ]

It looks like a television．Do you think so?——Yes．I ．

In ancient times, dogs were mainly ______helping people hunt( 打猎) .Now they are more useful-they can help the blinds, search for the bad eggs.

What were you doing when you heard Malaysian airlines flight lost?—I my homework.

Do you mean that he should prepare for his exam one year in advance? –Sure. Anyway,____.