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 |
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 |