问题
He _____ with a pencil. Now a pen _____ by him.
A:used to write; is used to writing
B:used to write; is used to write
C:is used to write; used to write
D:is used to writing; used to write;
B:used to write; is used to write
C:is used to write; used to write
D:is used to writing; used to write;
正确答案是：
