Have you been working in N0.5 Middle School since you graduated from college?~No, I _______ in the countryside for 3 years

Shall I invite Tom to my party?—Yes,it will be nice if you_________.

This is my dear teacher without_________help I couldn’t have passed that difficult exam.

ou’re learning to drive, _______ agood teacher makes a big difference

How long have you known John— Since he ______ to our class.