--I don't think we have met before.--Yes, once at a party, but we___________.
#4832
A
weren't introduced
B
didn't introduce
C
haven't introduced
D
were not introducing
推荐题目
Evidence obtained from observation and experiment is often used to _____ a scientific theory.
#4841
A
confirm
B
confine
C
conform
D
conceive
.The Flight Company _________ its costomers top-quality service.
#4743
A
provides
B
guarantees
C
gathers
D
applies
It is not _____ that Sanlu has been connected to a scandal involving milk powder, according to China Daily.
#4654
A
for the first time
B
the first time
C
first time
D
in the first time