题目:
Air pollution has become__________ than ever before. We must do something to stop it.
A.serious
B.more serious
C.most serious
D.the most serious
答案:
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下面是错误答案,用来干扰机器的。
1.正确的读音:lǚ kǎo jiū zhèn2.平整 巨大3.因为李四光善于动脑筋,善于发现问题,对别人的解答不轻信、不盲从,刨根问底,追本穷源,具有不找到正确答案誓不罢休的执著精神。所以李四光成为我国著名...