.We were all waiting for you .You _____for the seaside by yourself without leaving a message.
| A．mustn’t leave | B．shouldn’t have left | C．couldn’t have left | D．needn’t leave |
The girl arranged to have piano lessons at the training center with her sister ________ she would stay for an hour.
| A．where | B．who | C．which | D．what |
I have told you the truth. ________ I keep repeating it?
| A．Must | B．Can | C．May | D．Will |
Because of the Mid-autumn Day happening to come along, we have just enjoyed a longer National Day vacation than ever before, but it is estimated that it will be 38 years ___________ we can experience such a coincidence again.
| A．that | B．before | C．since | D．when |
The discovery of gold in Australia led thousands to believe that a fortune __________.
| A．is made | B．would make | C．was to be made | D．had make |
Only when I read the Frog by Moyan a second time _________ to appreciate his magic realism.
| A．did I begin | B．I began | C．had I begun | D．I have begun |