[单项选择]Without sufficient information, it can be very difficult to decide ______ a particular marketing program is profitable to your business or not.
A. how
B. that
C. whether
D. where

[单项选择]Readers （　） can very smoothly without knowing the exact meaning of each word.
A. get along
B. get over
C. get down
D. get through

[单项选择]

Without proper planning, tourism can cause problems. For ex ample, too many tourists can crowd public places that are also enjoyed by the inhabitants of a country. If tourists create too much traffic, the inhabitants become annoyed and unhappy. They begin to dislike tourists and to treat them impolitely. They forget how much tourism can help the country’s economy. (79)It is important to think about the people of a destination country and how tourism affects them Tourism should help a country keep the customs and beauty that attract tourists. Tourism should also advance the well— being of local inhabitants.
Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to work in the tourism industry. This means that other parts of the country’s economy can suffer.
On the other hand, if there is not enough tourism, people can lose jobs. Businesses can also lose money. It costs a great deal of money to build la
A. an increase of unemployment
B. a decrease in tourist attractions
C. the higher cost of support facilities
D. a rise in price and a fall in pay

[单项选择]Without my glasses I can hardly tell what has been written in the letter•
A. 如果不戴眼镜，我几乎不能说出信上写的是什么内容。
B. 如果不戴眼镜，我也差不多能看清信上写的什么内容。
C. 如果不戴眼镜，我很难辨认出信上写的是什么内容。
D. 如果戴着眼镜，我就能辨认出信上写的什么内容了。

[单项选择]Nobody can touch that box without permission because there is ______ in it.
A. an important information
B. some important information
C. some important informations
D. lots of information important

[单项选择]He is quite thoughtless, for very seldom can he ______ other people' s troubles.
A. agree with
B. interfere with
C. identify with
D. rest with

[单项选择]The longest time a human being can survive without sleep is probably ______.
A. five days
B. seven days
C. ten days
D. twelve days