Question

帮忙做一道英语题 急！！！！！！！！！！！！

In the past t~w years, many tall buildings have been built in our city. The tallest is an ________that stands in the centre.'
A. 80-floor building B. 60-floor building“
C. 80-floor buildings D. 70 floors building
单项选择

Answer 1

have
done
我们在过去的三年做了一些伤害你感情的事情。
in
the
past
three
years是现在完成时的时间标志，所以用现在完成时，表示过去的动作延续到现在

Answer 2

A```

原因1`
冠词是an``说明后面的数字一定是8开头的(其他是辅音`用a)

原因2
由building的词性可知`不可直接加s

综合上述理由``答案是A

Answer 3

ab
记住一句话：有连字符没有s，没有连字符加s

Answer 4

A or B.
记住一句话：有连字符没有s，没有连字符加s

Answer 5

A 啊 eight 发 a 元音所以前面是an 么