问题
                    
He was last seen _________in his office at about 7:15p.m..
                            A: work
B:working
C:to work
D:worked
                        
                        B:working
C:to work
D:worked
正确答案是:
                         
                        
                        
                    同类题型
                    Only after they had discussed the matter for several hours ________ a decision.[ ]
e decided to fulfill thetask in time, difficulties wemay meet with.
If you can’t find the place, I will show you_______.
Shall we fly kites in the park this afternoon-_______. I will see my grandparents in my hometown.