( )are very popular.they can help us do many things

( )are very popular.they can help us do many things _________are very popular.they can help us do many things. 英语阅读,The police do many things for us．They help keep our thi they are very _____(help)to us. they can do many things for There are many things you can do to help children learn prob there are many things to wait for us to do They can't help seeing things _____they do. my neighbors are very f_____.they often help us 改错robots can help us do many work They are i() and can tell you many things. They can help us （do） our work better.