問(wèn)題補(bǔ)充：
單選題
_______the people have become masters of their country _______ science can really serve the people.A.It is only then; thatB.It was that; whenC.It is only when; thatD.It was when; then
網(wǎng)友答案：
熱心網(wǎng)友 1樓
C解析It is ... that ...是強(qiáng)調(diào)句式，強(qiáng)調(diào)的是when引導(dǎo)的時(shí)間狀語(yǔ)從句。句意：只有當(dāng)人民成為自己國(guó)家的主人時(shí)，科學(xué)才能真正為人民服務(wù)
