问题
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
B:I had felt
C:I have felt
D:had I felt
正确答案是：
同类题型
The shop ________ at 8:00 a.m. and it ________ for ten hours every day.
_____ the child to bed, she began to correct the pupil’s exercise. [ ]
I remember a ____ famous scientist said that we shouldbelieve in ourselves first of all.
The famous scientist grew up _______ he was born and in 1950 he came to Nanjing .