Can you give me some advice about the design— I think it should _______ to all ages andsocial groups.

I often go to the centre of the city________ taxi, but John goes there ________ a bike.

Not only the young but also the old are getting interested _______Wechat.—They can communicate more freely.

Listen! Do you hear someone _________ for help?

Is this the reason ______ at the meeting for his carelessness in his work?