---We all had a lot of fun at the barbecue yesterday. Pity you weren’t there. ---I really should have gone with you, but I ________ on some remaining problems. 
#101084
A
was working
B
would work
C
worked
D
had worked
推荐题目
The last time I _______ Jack, he _______ football with classmates.
#103585
A
had seen; was playing
B
saw; played
C
had seen; playing
D
saw; was playing
Ladies and gentlemen, please fasten your seat belts .The plane _____ .
#101606
A
takes off
B
is taking off
C
has taken off
D
took off