Being young means having all kinds of possibilities, so you should challenge your limits and go ______ your boundaries

Could I borrow your smart phone– _______ , but please give it back by Friday.

It remains unknown ________ the peace talk between the two countries is going to lead.[ ]

Why don’t we choose that road to save time—The bridge to it _____________.

Can you tell me who the woman going to the hall is—A famous writer ______to give us a lecture.