The game is not very difficult _______ you understand the rules.A．untilB．thoughC_刷题宝

题干

The game is not very difficult _______ you understand the rules.

A．until	B．though
C．once	D．unless

上一题下一题 0.65难度单项选择更新时间:2018-12-18 09:22:56

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