Betty is in China_____ her father and mother. [ ]

What a beautiful dress you are wearing! It must be expensive. —No. It only ____ me fifty yuan.

_____ will you play basketball with me?- In about 20 minutes after finishing my homework.[ ]

All the students are working hard now.—_______. Because all of them want to go to good colleges.

I won’t go to Yukio’s birthday this Saturday evening. — If you don’t, ______. [ ]