Sometimes it's not safe___things on the Internet.A.buyB.buysC.buyingD.to buy,

Sometimes it's not safe___things on the Internet.A.buyB.buysC.buyingD.to buy,
Sometimes it's not safe___things on the Internet.A.buyB.buysC.buyingD.to buy,

Sometimes it's not safe___things on the Internet.A.buyB.buysC.buyingD.to buy,
此题选D
句子翻译是：有时,在网上买东西不安全
考点是固定句型：it is +adj+(for/of sb)+to do sth：（对某人来说）做某事怎么样
sometimes：有时
safe：安全的
on the internet：在网上

答案：【to buy】it is+形容词+to do sth 做某事怎么样

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答案是 动词不定式作真主语 选 D.to buy

D.IT'S NOT SAFE TO DO STH