问题
                    
When do you go shopping?— I usually go shopping ____ Sunday mornings. [ ]
                            A: on 
B: in
C: at
D:for
                        
                        B: in
C: at
D:for
正确答案是:
                        
                        
                        
                    同类题型
                    The ancient penguin was modern ones and it was good at swimming but couldn’t fly.
Look! The light is still on in our teacher’s office.— Probably she ______ her work yet.
Those eggs ______ , please throw them away.
Is Jack good at basketball? —Yes. ______ basketball he is also good at table tennis. [ ]