Previously ______ at a fast food restaurant, the Smiths were dissatisfied with the unhealthy meals they served there. 
#93071
A
volunteered
B
to volunteer
C
volunteering
D
having volunteering
推荐题目
_______ a post office, I stopped _______ some stamps. 
#97445
A
Passed, buying
B
Passing, to buy 
C
Having passed, buy
D
Pass, to buy
_____ in a white dress, the bride(新娘) looks very happy.
#90172
A
Dressed
B
To dress
C
Dressing
D
Having dressed