问题
                    
What are you doing? —— I _____ a letter to my pen pal.
                            A:write
B:am writing
C:writes
D:am write
                        
                        B:am writing
C:writes
D:am write
正确答案是:
                        
                        
                        
                    同类题型
                    ______doeshismotherlike?—Ateacher. [ ]
What should I get _______ my dad?—How ________a tie?[ ]
There is 8-year-old boy playing Chinese chess with his friend in the classroom.
My mother likes volleyball. She thinks (认为) it is _______.
His pronunciation is better, for he kept ______ a short passage after the tape every morning.