ys children have to takearts, music and sports classes in their free time ____ busy schoolwork

You are so _______to have brought your laptop. You see, mine is broken.

It is only 　　　　 people know the importance of science 　　　　 science can really serve the people.

The English-Chinese dictionary ______ my father bought for me many years ago is still of great value.

Li Gang was required to apologize ___ the people present at the meeting ______ what he had done