_____ in the queue for an hour,Tom suddenly realized that he had left his wallet at home.
#103270
A
To wait
B
Have waited
C
Having waited
D
To have waited
推荐题目
---How is your mother doing? Is she ________? --Oh, thank you. As a matter of fact, she _______. 
#102419
A
looking up; has recovered
B
picking up; is already back on her feet
C
picking out; is well again
D
taking up; has already been back on her feet
I______toward the door to go outside when suddenly Jim opened it.
#99533
A
was walking
B
walked
C
hadwalked
D
walk