问题
选择题
The Apple Company had scarcely released i-Phone ______ it became one of the best-selling electronic products.
A．than
B．before
C．while
D．when
答案
答案：D
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The Apple Company had scarcely released i-Phone ______ it became one of the best-selling electronic products.
A．than
B．before
C．while
D．when
答案：D