It is very kind ____ you to help me with these maths problems because it is very difficult ____ me to work them out.
| A．of; for | B．of; of |
| C．for; of | D．for; for |
相关试题
All of us find _ necessary to take exercise every day.
| A．this | B．that | C．them | D．it |
He has something wrong with his _ .He cannot see clearly.
| A．leg | B．eye | C．hand | D．arm |
粤公网安备 44130202000953号