【简答题】动词填空。 1. We should try our best (help) others. 2. Why not (go)the Great Wall with us? 3. The boy is crying. Can you make him (laugh)? 4. I hope (become) a famous singer. 5. He was late for school beca...
【简答题】A.They help people save time on housework. B.They go into the garbage heap. C.They are harmful to the environment. D.They make products more expensive.