(2013·甘肃兰州名校高三检测)I have been living in the United States for 20 years, but seldom ________ so lonely as now.
A．have I felt B．I had felt
C．I have felt D．had I felt
(2013·东北三校一模)I am certain by no means ________ his word since he has promised an amount of money to the poor.
A．he will break B．will he break
C．broke D．did he break
(2013·安徽蚌埠一次质检)So quickly ________ is a possibility today may be a reality tomorrow.
A．are science and technology advancing that
B．science and technology advancing are that
C．science and technology are advancing what that
D．are science and technology advancing that what
(2013·辽宁高考)At no time ________ the rules of the game. It was unfair to punish them.
A．they actually broke
B．do they actually break
C．did they actually break
D．they had actually broken
(2013·福建高考)Not until he went through real hardship ________ the love we have for our families is important.
A．had he realized B．did he realize
C．he realized D．he had realized
(2013·山东济宁模拟)How close parents are to their children ________ a strong influence on the development of the children's characters.
A．having B．had C．has D．have
