Someone called me up in the middle of the night, butthey hung up I could answerthe phone.

Many parents died in Wenchuan earthquake, so children were ________ by our government.

Can you make sure _______ the gold ring

He cooked a great meal to ______ the help of his neighbors in finding his lost little daughter.

How did you work out the difficult chemistryproblem— I worked it out by ________.