题目内容

    how to work out the difficult physics problem ,he asked the teacher for help .
A．Not to knowB．Not knowingC．Knowing notD．Not known
B

试题分析：句意是：不知道怎么解决这个难的物理问题，他向老师求助。因为he和know是主动关系，用现在分词做状语，否定式是在现在分词前面加not，选B。
练习册系列答案
相关题目
–Did you get your pay?
–Yes, I remember ______. But I forget the exact amount.
A．payingB．to be paidC．having paidD．being paid
The snow lasted a week, ________a serious traffic confusion in the whole area.
A．causing B．causeC．to causeD．caused
The game was so exciting to play that the boy kept his eyes and attention ________ on it, ruining both a lot.
A．fixingB．fixedC．to fixD．fix
The killer insisted that she was defending herself when  _______.
A．attackB．attackedC．to attackD．having attacked
______ money, his parents couldn’t send him to university.
A．LackedB．Lacking ofC．Lacked inD．Lacking
___________ the man who lost the purse, Mike had to stay there longer.
A．Not findingB．Not foundC．Not having foundD．Having not found
We’re conducting a nationwide survey of people’s reading habits. Would you have five minutes ________ a few questions?         
A．answeringB．to answerC．to have answeredD．having answered
— Look how happy you are!
—Yeah, I feel honored ______ into their society.
A．to welcomeB．welcoming C．to be welcomedD．welcomed

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网