问题
                    
What ____ you ______ at this time yesterday?
                            A:did ; do
B:is; doing
C:were; doing
D:are ; doing
                        
                        B:is; doing
C:were; doing
D:are ; doing
正确答案是:
                        
                        
                        
                    同类题型
                    His son is _______ now. Today it’s his _______ birthday.
You don’t look . Are you ill ? – No , I’m just a bit tired .
You don’t look ______ today; you’d better go to see the doctor.
Must I go to the shop with you,Mum?—Err… I can make it myself,Mike. You go with me.
How do you like working here?—_______.To be honest,I miss my former colleagues.