If you ___ (not know)the answer,you'd better ____(put)up your han_英语解答

If you ___ (not know)the answer,you'd better ____(put)up your hands.怎么写,急

人气：376 ℃　时间：2019-09-24 05:05:36

解答

don't know,put
if主将,从现.you 一般现在时的否定句用：don't + 动词原形
had better do sth.最好做某事,所以用动词原形