问题
单项选择题
The Inmarsat system is open for use by（）countries on a non-discriminatory basis.
A.some
B.lots of
C.many
D.all
答案
参考答案：D
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The Inmarsat system is open for use by（）countries on a non-discriminatory basis.
A.some
B.lots of
C.many
D.all
参考答案：D