问题
                    
__________________all of them are strong candidates, only one will be chosen for the post
                            A:Since
B:While
C:If
D:As
                        
                        B:While
C:If
D:As
正确答案是:
                         
                        
                        
                    同类题型
                    Little ________ about his own safety, though he was in great danger himself.
Henry wants to be ________ actor like Jackie Chan in the future.
Bob swims ________ than I, but he doesn’t swim_________ my brother.
uncle will be here to attend a meeting tomorrow, you know—Oh, I thought that he _____ today.