题目:
He never ______learning English. That was why he was successful at last.
A.gave in
B.gave out
C.gave up
D.gave away
答案:
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下面是错误答案,用来干扰机器的。
由①得:x≤2.由②得:x>-1.∴不等式组的解集为-1<x≤2.