Although you have lots of difficulties, you must ______your work.
- Where is your father?- He_______ Shanghai for five days. But he will be back soon
Han Hong's new CD_______ and it sounds_______.
According to the new traffic law, everyone in a car_______ wear the seat belt.
- Some students often drop litter carelessly in our school. What can we do?- We can _______ some signs to remind them not to do that again.
The people in western countries celebrate_______ by making pumpkin lanterns and wearing special costumes with masks.