Pieces of bamboo or wood ________ books

问题选择题

Pieces of bamboo or wood ________ books between 2^nd and 5^th century AD.

A. used to formed B. used to form

C. were used to form D. used to beforming

答案

答案：C

题目分析：句意：竹片或木片被用来制成书在公元2-5世纪。这里是短语be used to do被用来;used to do过去常常;根据句意故选C。

点评：本题难度适中。固定短语主要考查它们的意义，但是它们是在一定的语言环境下而出现的，所以考生必须能正确理解句子的句意。这里主要区别含有use的两个固定短语。

即学即练：Jack ________ assist Mary in her lessons.

A. used to assist ed B. used to assist

C. were used to assist D. used to assisting

解析：B。句意：杰克过去常常帮助玛丽学习功课。