1．A）As B）Since C）While D）Although
___1____ some newly independent countries have understandably restricted most jobs to local people， others have attracted and welcomed migrant workers.
C. 分析：备选项是连词注意分句之间句意。
补充：
Restrict： vt. vt. 限制于；限定于
e.g. He restricted himself to two cigarettes a day
限制每天吸两枝香烟（香烟仅限每天两根）
2．A）which B）where C）when D）there
3．A）call in B）call off C）call up D）call on
This is particularly the case in the Middle East， __2__ increased oil incomes have enabled many countries to __3___ outsiders to improve local facilities.
B. 分析：备选项是连词注意分句之间句意。
A. 分析：备选项是短语，注意利用组成短语的各成分的基本词义判断短语的含义。
call in v.召集， 召来， 来访
call up v.召唤， 使想起， 提出， 打电话给
call on v.号召， 呼吁， 邀请， 访问
4．A）But B）Moreover C）Besides D）Thus
___4___ the Middle East has attracted oil-workers from the U.S.A. and Europe.
D. 分析：备选项有连词，有副词时注意分句之间的逻辑关系。
5．A）include B）includes C）including D）included
It has brought in construction workers and technicians from many countries， ___5___ South Korea and Japan.
C. 分析：备选项都是同一词时，从语法搭配的角度考察答案选项。
6．A）surprised B）surprisingly C）surprise D）surprising