________hard before, Tom is afraid of failing in the exam. 
#97409
A
Having been worked
B
Not to have worked
C
Having never worked
D
Never have worked
推荐题目
_______ late the next morning, Bob turned off the alarm.
#91855
A
To sleep
B
Sleeping
C
Sleep
D
Having slept
They suggested that the professor ______ just now ______ chairman of the meeting.
#92344
A
referring to; was made
B
referring to; be made
C
referred to; be made
D
referred to; was made
Would you like _____me?
#96516
A
to join
B
taking
C
join
D
joining