The soup is too cold.It requires ____.A.to heatB.heatingC./D./为啥选B?

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The soup is too cold.It requires ____.A.to heatB.heatingC./D./为啥选B?

The soup is too cold.It requires ____.A.to heatB.heatingC./D./为啥选B?
The soup is too cold.It requires ____.
A.to heat
B.heating
C./
D./
为啥选B?

The soup is too cold.It requires ____.A.to heatB.heatingC./D./为啥选B?
require/need doing=require/need to be done
这里就是被动语态的用法啦...是固定的...汤需要被加热一下...

是固定语态,词后用ing形式

requires doing sth

require doing,是固定词组