1. The question is too hard. Nobody can a________ it by themselves.
2. I need five gifts for my family. But I only have 20 dollars for e________ one.
3. I hear something. Maybe s________ is playing in the next room.
4. The boy has many ________ (惊喜) in China.
5. —What did your bike ________ (花费)?
—400 yuan.
