完形填空
阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
Migrant workers
In the past twenty years, there has been an increasing tendency for workers to move from one country to another. ___1____ some newly independent countries have understandably restricted most jobs to local people, others have attracted and welcomed migrant workers. This is particularly the case in the Middle East, __2__ increased oil incomes have enabled many countries to __3___ outsiders to improve local facilities. ___4___ the Middle East has attracted oil-workers from the U.S.A. and Europe. It has brought in construction workers and technicians from many countries, ___5___ South Korea and Japan.
In view of the difficult living and working conditions in the Middle East, it is not __6__ that the pay is high to attract suitable workers. Many engineers and technicians can earn at least __7___ money in the Middle East as they can in their own country, and this is a major attraction. An allied benefit is the low taxation or complete lack of it. This increases the net amount of pay received by visiting workers and is very popular with them.
Sometimes a disadvantage has a compensating advantage. __8__, the difficult living conditions often lead to increased friendship when workers have to depend on each other ___9___ safety and comfort. ___10__, many migrant workers can save large sums of money partly __11__ the lack of entertainment facilities. The work is often complex and full of problems but this merely presents greater challenge to engineers who prefer to find solutions __12__ problems rather than do routine work in their home country.
One major problem which __13__ migrant workers in the Middle East is that their jobs are temporary ones. They are nearly always on contract, so it is not easy for them to plan ahead with great confidence. This is to be expected since no country welcomes a large number of foreign workers as permanent residents. __14__, migrant workers accept this disadvantage, along with others, because of the ___15__ financial benefits which they receive.
1．A As B Since C While D Although
2．A which B where C when D there
3．A call in B call off C call up D call on
4．A But B Moreover C Besides D Thus
5．A include B includes C including D included
6．A surprised B surprisingly C surprise D surprising
7．A twice as much B twice as many C as much as twice D as many as twice
8．A Similarly B As a result C For example D Anyway
9．A with B for C about D in
10．A On the contrary B In a similar way C On the other hand D Consequently
11．A because of B on C because D with
12．A in B about C for D to
13．A effects B affects C detects D reflects
14．A In case B In all cases C In a case D In any case
15．A considerable B considerate C considered D considering
