—Hi, Susan, you look tired.—I ______ for months for the coming celebration for the school’s 60th anniversary.
#101623
A
was preparing
B
have been preparing
C
had prepared
D
prepare
推荐题目
 When I said some students were so lazy, I ___to you.
#101816
A
don’t refer
B
wasn’t referring
C
didn’t refer
D
hasn’t referred
The teacher said that Columbus _______America in 1492.
#102954
A
discovered
B
found
C
had discovered
D
had found
He devoted himself to action rather than talk, so his dream ______ in the end. 
#99120
A
was become a reality
B
was come true
C
realized
D
was realized
I would have come earlier, but I _____ that you were waiting for me.
#102993
A
didn’t know
B
hadn’t known
C
haven’t known
D
wouldn’t have known