From his________expression on his face，we can see that he was very________at his driving test result.

Is this your dad—No,________. That’s my uncle.

This math question is too difficult. Can you help me__________

How much do you know about the3D film technology—A little. Not until _______thehot movie Avatar _______ some about it.

Mary and Jack will marry next week.—-____________ They were strangers to each other only a month ago.