海伦这会儿不在。要我捎个口信吗?
Helen is not here at the moment.Can I ?
Blue and green are usually not a good (相配).
Neil Armstrong said that one small (一步) for a man,one giant leap for mankind.
Modern (医学)is developing fast.As a result,many diseases can be prevented or cured.
Look!The children are enjoying (他们自己) in the playground.How happy they are!
— Amy,can you lend me your (照相机)tomorrow?
— No problem.