While the boy ______ down the street, the UFO _____ . 
#41890
A
was walking; was landing
B
walked; landed
C
was walking; landed
D
walked; was landing
推荐题目
Yesterday I met Jim. We ____________ each other since we _________ middle school.
#38425
A
haven’t seen ; finished
B
haven’t seen; finishing
C
hadn’t seen; finishing
D
hadn’t seen; finished
Tony is very nice. He is the most enjoyable person I        .
#36545
A
meet ever
B
have ever met
C
had ever met
D
met