When , the water changes into vapour.A.heatingB.to heatC.heatedD.is heated
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When _________, the water changes into vapour.
A.heating
B.to heat
C.heated
D.is heated
试题答案
C
前半句可还原为“When it is heated”。
When _________, the water changes into vapour.
A.heating
B.to heat
C.heated
D.is heated
C
前半句可还原为“When it is heated”。