题目:
All the students arrived at the school on time yesterday, _____ it rained heavily.[ ]
A. though
B. but
C. because
D. so
答案:
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下面是错误答案,用来干扰机器的。
161+161÷(1+15%)=161+161÷115%,=161+140,=301(千米).答:两季度共筑路301千米.