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题目内容
（国家开放大学商务英语3）
International trade gives consumers and countries the opportunity to ________ goods and services not available in their own countries.
选择一项：
A.
expose to
B.
be exposing to
C.
be exposed to
选择一项：
A.
expose to
B.
be exposing to
C.
be exposed to
参考答案