45．It is widely accepted that young babies learn to do things because certain acts lead to ______.

A．rewards　 　　　　 B．prizes　　 　　　　　 C．awards　　 　　　　 D．results

44．We have every reason to say that ______ 2008 Beijing Olympic Games is ______ success.　

A． /, a　　　 　　　　 B． the,/　　 　　　　 C． the, a　　 　　　　 D． a; a　

43．The information on the Internet gets around much more rapidly than _____ in the newspaper.

A． which　 　　　　　 B． those　　 　　　　　 C． one　　 　　　　　 D． that　　　

42．In the botanical garden we can find a(n) ________ of plants that range from tall trees to small flowers.

A． species　 　　　　 B． group　　 　　　 C． amount　 　　　　　 D． variety

41．I was given three books on cooking, the first ____ I really enjoyed.

A．of that　　 　　　 B．of which　 　　　　 C．that　　　　　 　 D．which

40．_________ modeling business is by no means easy to get into, the good model will always be in demand.

A．While　　　 　　　 B．Since　　　　 　　 C．As　　　 　　　　　 D．If

39．The mother didn’t know _______was to blame for the broken glass as it happened while she was out.

A．who　　 　　　　　　 B．whoever　　 　　　 C．how　　　 　　　　 D．what

38．This is a very interesting book. I will buy it, _____________.

A．no matter how it may cost　　　　　 　 B．how may it cost

C．how much may it cost　　　　　　 　 D．however much it may cost

37．Engines are to machines _________ hearts are to animals.

A．as　　　 　　　　　 B．that　　　　 　　 C．what　　　　 　　 D．which

36．They had such a fierce dog ______ I had never seen.

A．as　　　 　　　　　 B．that　　　 　　　　　 C．which　　　 　　 D．and