—I bought this shirt for 35 yuan yesterday. —It’s on sale today for only 29. You should have waited. —Oh, really? But how ________ I know? 
#104781
A
would
B
can
C
did
D
do
推荐题目
He________Beijing,so he knows a lot about it.
#99171
A
has gone to
B
has been to
C
went to
D
goes to
By the end of last year, we _________seven hundred English words.
#102070
A
learned
B
have learned
C
had learned
D
would have learned
Hello, I _______ you ______ in London. How long have you been here?
#102196
A
don’t know; were
B
hadn’t known; are
C
haven’t known; are
D
didn’t know ; were