23. If we ______ adequate preparations, the conference wouldn’t have been so successful. 

41. The passage is mainly about the differences between British English and American English in _____. 

（ ）51.Although Rob lead a quiet life in a small village, that doesn’t stop him from wanting to find out about the latest scientific development.

50. Try to eat light and avoid greasy,______ and salty food because it adds toxins to the body.

27. People have heard ______ the President has said, they are waiting to see what he will do.

20. Please send us all the information ______ you have about the candidate for the position.

5.

4.

49. ______ absorb smelly sweat easily and therefore are better at hiding body odor.

29. ______ is known to everybody, the moon travels round the earth once every month.

47.You can get the bacteria under control by bathing with your soaps ______ for two weeks.

35. Learning a language is about_____,so in order to grasp a language,it‘s wise to study on a daily basis.