Putting a knife into an electrical socket is dangerous. It is ........................................................................................

Putting a knife into an electrical socket is dangerous.

It is ………………………………………………………………………………..

Đáp án: It is dangerous to put a knife into an electrical socket.

Giải thích: It + be + adj + to V (Thật … khi làm gì)

Dịch: Đưa dao vào ổ điện rất nguy hiểm.

Putting a knife into an electrical socket is dangerous. It is …………………………………………………………………………….