Because they are concerned about their weight.
Because they are allergic to milk products.
Because they have a lot of health problems.
Because they frequently complain about their food.
第1题：
A.Because people do not realize the harmfulness of it.
B.Because contaminated food products are easy to produce and sell.
C.Because those food manufacturers only focus on making money.
第2题：
Why does the author think the BMGF is the most innovative and successful in history? _________.
A． Because their money is ruled to be given to the really needy people.
B． Because they insist that good intentions should lead to good results.
C． Because their response is immediate if the need is immediate.
D． Because they have to know that every check from Seattle is actually used.
第3题：
Why did they found Google?
A． Because they loved working with the Internet so much.
B． Because they wanted to make a lot of money through the Internet.
C． Because they hoped to make it easier to find specific information online.
D． Because they believed everything is possible.
第4题：
A、Because you tell the hosts that you enjoy the evening.
B、Because you cannot complain how bad the party is.
C、Because you invite the hosts to your dinner party.
D、Because what you do is different from what you really feel.
第5题：
Why was University Tower torn down?
A．Because a bell tower was to the built on the site.
B．Because it was found unsafe.
C．Because a parking lot was to be constructed there.
D．Because no one wanted to preserve it.
第6题：
Why does it take long for people to change their food?
A． Because labs are not easily accessible to researchers.
B． Because some people are reluctant to accept the new diet.
C． Because food consumption is a culture of conservation.
D． Because some scientists are against the growing lab meat.
第7题：
Why do many of the boys avoid certain instruments?
A．Because they find it not challenging enough to play them.
B．Because they consider it important to be different from girls.
C．Because they find them too hard to play.
D．Because they think it silly to play them.
第8题：
Eat some vegetables and fruit every day because they are (health) food.
第9题：
25． Why do we call the sun"a life-giving star"?
A． Because it gives us warmth．
B． Because there are some living things on it．
C． Because plants and animals can't live without it．
D． Because people have to live in the dark without it．
第10题：
The runners are very strong because they eat a lot of h______ food．