The new traffic rules that took effect on January 1 are much stricter than________in the past

There are still many problems ______ before we are ready for a long stay on the Moon.

Hurry! Class ________. You know the first class _____ at 7:30.

Do the Chinese like playing basketball — .

It is____ of you to help so many people and it is important____ us to be kind to others.