let's make it at 3 o'clock on saturday afternoon ,为什么要用介词it?

let's make it at 3 o'clock on saturday afternoon ,为什么要用介词it? let ^s make it at 5 o^clock in the afternoon.这句话对吗 let's ____ it at 4 o'clock A make B help 选哪一个,为什么 Let's make -----five o'clock A it at B it Let's make __8 o'clock to meet at the gate of Linyi Zoo.A.it Let's make it at 6 o'clock 的表达是正确的吗? “make it 后面直接+时间不用介词”"用法六 表示约定时间".”Let’s make it at seven o’ let's make it half past eight为什么具体时间前不加介词at It's twelve o'clock.Let's it's four o'clock in the afternoon.let's_____together. A hav It'stwelve o'clock.let's have( ) 一道完型填空题It is 5 o’clock on Saturday afternoon.Mary is in the