Though I was tired out that evening, I _____ from falling asleep by the great pain in my knee. 
#100941
A
was prevented
B
had prevented
C
has prevented
D
am prevented
推荐题目
—Remember how we met for the first time, Dick? —Of course I do.You ______ to the teachers’ office hurriedly and ______ me.
#101601
A
had walked; weren't noticing
B
were walking; didn't notice
C
had been Walking; noticed
D
walked; had noticed
I thought it __ very boring, but it wasn’t.
#103593
A
is going to be
B
was going to be
C
used to being
D
can be
—Have you got your exam papers? —Not yet. I guess they _____ at this moment. 
#103131
A
are being graded
B
are grading
C
have graded
D
have been graded