问题
                    
They do some exercises ________ Friday morning. [ ]
                            A: on 
B: in
C: at
D:to
                        
                        B: in
C: at
D:to
正确答案是:
                        
                        
                        
                    同类题型
                    ___, but he still couldn’t understand the logical connection of the two subjects.
Which is more important, English or math?—I think English is as _______ as math.
Jane’s opinion is different from _______, but I really agree with _______.
We have to ______ the plan till next month because of the bad weather.
Jack took music than any boy in his class and held a concert successfully.