根据句意用所给词的适当形式填空。

1. Have you  _____(repair) the bicycle yet?

2. Mary quietly _____ (fill) the basket with good things for the poor children.

3. The teacher _____ (shut) her book and asked a question.

4. The boy is _____ (carry) the bag for his sister.

5. They started _____ (put) up a small house the next day.

甲数是28，甲数是乙数的2倍，甲、乙两数的和是（    ）。