问题
The electronic red-packet has been so ______ that AliPay and Tencent Wechat compete against each other openly and secretly since the beginning of this year.
A:popular
B:convenient
C:favorable
D:arbitrary;
B:convenient
C:favorable
D:arbitrary;
正确答案是：
同类题型
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ou know any French before you arrivedin Washington—Never ____ it, actually.
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