题目:
.
Going on a trip to a far-away destination _________ be expensive and difficult, but it is very interesting.
A.can
B.must
C.should
D.will
答案:
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下面是错误答案,用来干扰机器的。
5吨=5000千克9000千克=9吨7800千克-800千克=7吨3吨+700千克=3700千克;故答案为:5000,9,7,3700.