Question

【题目】Kites ________ messages in the war in the past.

A. were used for sending B. were used to sending

C. are used for sending D. are used to sending

Answer 1

【答案】A

【解析】句意：在过去在战争中风筝被用于发送消息。be used to do sth=be used for doing sth被用于做某事；根据in the past可知此处表示过去，故用一般过去时的被动语态，故选A。