2013高考英语二轮单项选择高效训练（20）及答案
Ⅰ.单项填空
1．__________ made the little boy so sad is __________ his parents didn’t allow him to go out for a picnic with other boys.
A．What；because B．What；that
C．That；because D．That；what
解析：选B。句意：使这个小男孩如此伤心的是他的父母不允许他跟其他男孩出去野餐。第一空用what引导主语从句，what在从句中作主语；第二空用that引导表语从句，that在从句中不作任何成分，也没有实际意义，只起连接作用。
2．—What did you do yesterday afternoon?
—We discussed __________ Mary could joi n us.
A．whether B．if
C．that D．what
解析：选A。句意：“你们昨天下午干什么了？”“我们讨论了玛丽是否可以加入到我们中来。”discuss后的宾语从句只用whether不用if引导，意为“是否”，且不在从句中作成分。that在名词性从句中不作任何成分也没有任何意义；what常在名词性从句中作主语、宾语、表语等。
3．The textbook is filled with cases about __________ our life has developed thanks to new inventions.
A．what B．where
C．why D．how
