1.Mr.White found it hard to (C )well with his son.
A.say
B.tell
C.communicate
2.Mary isn't in.I don't know (B ).
A.when she came back
B.when she will come back
C.when will she come back
3.Next year I'm going to work harder( B).
A.get good grades
B.to get good grades
C.for getting grades