Although        very hard, he didn’t pass the exam.
#95176
A
work
B
to work
C
working
D
worked
推荐题目
A new technique ____ out, the yields (收成) increased by 20% .
#98832
A
having working
B
having been working
C
has worked
D
had been worked
Most people prefer _____money______it .
#94497
A
spending; to earning
B
to be spending ; to be earning
C
to spend; to earn
D
having spent; to having earned