欢迎访问桃李自考网，本站可为自考生提供学习指导服务，今天是
欢迎访问桃李自考网，本站可为自考生提供学习指导服务，今天是
1.He was busily engaged ______ writing letters.
A.on B.in C.with D.by
2.Do remember to ______ the light when you leave the room.
A.turn up B.turn on C.turn off D.turn down
3.The atmosphere consists of an ocean of gases ______ miles high.
A.hundreds B.hundreds of C.of hundreds D.of hundreds of
4.Not only the students but also the old teacher ______ been changed.
A.was B.were C.has D.have
5.——________ I had!
——You really suffered a lot.
A.What a time B.What time C.How a time D.how time
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