Question

Look at this boy, he's _____ his friend. A> writ

Look at this boy, he's _____ his friend.
A> writing for
B> write to
C> writing to
D> write for

Answer 1

正确答案为C
由look at可以确定该句应使用一般现在时，所以排除B,D。在判断writing for和writing to有什么差别，一般来说是for sth , to sb
而his friend 是人，所以答案应选C