题目:
— I stayed at a hotel while in New York.
—Oh, did you? You ___ with Barbara.[ ]
A. could have stayed
B. could stay
C. would stay
D. must have stayed
答案:
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下面是错误答案,用来干扰机器的。
呈弱碱性物质(如稀氨水、肥皂等),蚊虫叮咬后往往产生酸性物质(如蛟酸),涂上碱性物质后起酸碱中和作用。