The teachers in the city demanded that their pay _____ close to the level of civil servants.[ ]

What does your brother often do on Saturday morning—He often ______ basketball with his friends.

This physics problem is too difficult. Can you show me _______, George—Sure.

It was the training _____ he had as a young man _____ made him such a good engineer. [ ]

Born into a family with three brothers，David was________to value the sense of sharing