— ____ visited the Shanghai World Expo is sure to tell you the place is worthy ____ twice．
— You can say that again．
| A．Those who have; visiting | B．Whoever has; visiting |
| C．Those who have; to be visited | D．Whoever has; to be visited |
Many a time ________ swimming alone.
| A．the boy went | B．went the boy | C．did the boy go | D．did go the boy |
It was not until I began to work that ______ how much time I had wasted.
A did I realize B didn’t I realize C I realizeD I realized
Not until I began to work ____ realize how much time I had wasted.
| A．didn't I | B．did I | C．I didn't | D．I |
So loudly _____ that ____ hear her clearly.
| A．did she speak; could everyone | B．did she speak; everyone could |
| C．she spoke; could everyone | D．she spoke; everyone could |
Only when the meeting was over___ go back to meet his friend.
| A．he could | B．he was able to | C．was he able to | D．was able to he |