Mr. Smith didn’t go to the party because he had a lot of experiments _____. 
#90778
A
do
B
did
C
done
D
to do
推荐题目
 Which do you enjoy____________ your weekends, fishing or watching TV?
#95232
A
spending
B
spend
C
being spent
D
to spend
Jack had his house _______ last night and he and his family were left homeless.
#97116
A
burning down
B
to burn down
C
burn down
D
burned down
Are you going to the concert ______ on Friday evening in the people’s Square?
#92296
A
to hold
B
to be holding
C
to have held
D
to be held