43.My new hometown is _________ (round) by green hills and covered with green trees.
44.They were in ________ (agree) with hiring another two people to be the doorkeepers.
45.We all know that there are lots of __________ (advantage) of using the air-conditioners at home, but it’s really too hot to work here.
46.I think _________ (dry) food is not tastier but easier to carry when you go hiking.
47.You’d better have some _________ (sleep) pills if you can’t sleep well at night.
48.—Hello! May I speak to Mr. White, please? —Please _________(稍后) and I’ll put you through.
49.If you feel _______ (没有把握) about this problem, you’d better ask him for help. He’s good at it.
50.However, two young babies were found ________(活着). Life is super-nature!
51.________ (污染) air does harm to our health. It’s necessary to keep air fresh and clean.
52. A robot can read a book in five minutes and tell you about it _____ (用) clear language.