1.Choose the best answer：(选自职称英语考试指定用书)
(cultural Differences 难度B，C级)
Many travelers find _1__ easier to meet people in the U.S. than in other countries. They may just come up and introduce themselves or even invite you over __2_ they really know you.
1. A. this B.it C.them D./
2. A. when B.if C.after D. before
(Canned Foods: Convenience and Nutrition 难度B，C级)
Fruit and vegetable canning is as simple _1__ when your grandmother "put up "tomatoes and other things from the garden. Fresh produce is taken from the field at just the right time, delivered to the cannery, checked, sealed and sterilized. All this generally happens in less __2_ 24 hours for the best quality and nutritional values without the need for any preservatives.
1. A. as B.than C.to D.same
2. A. to B.than C.about D. around
(Public and Private Schools in the United States 难度B，C级)
Americans offer __1_ great variety of reasons for doing so, including the desire of some parents to bring their children to schools..
1. A. a B.the C.some D./
2.Put in "the" or "a (an)" if necessary:
1. Do you know ___ time? Yes, ___ clock in ___ hall has just struck nine.
2. ___ youngest boy has just started going to ___ school; ___ eldest boy is at ___ school.
3. ___ first computer in ___ world was a lot bigger than ___ abacus or ___ adding machine.
3.What do the three "it" refer to?/下面三个“it”分别指代什么?
(Dyslexia 难度B，C级)
However, research has shown that dyslexia is more common in males than in females, and it is found more often in persons who are left-handed. No one knows the cause of dyslexia, but some scientists believe that it may result from chemical changes in a baby's body long before it is born.
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