---I think it’s going to be an argument.（争论）
---Yes, it could be.
---I wonder ______we can do .
| A．what | B．how | C．when | D．whether |
He couldn’t ______ the fact that the money was found in his house.
| A．answer for | B．leave for |
| C．account for | D．care for |
She ______have stopped her work halfway.
| A．ought to not | B．ought not to |
| C．not ought to | D．does not ought to |
—Have you heard the story of “The Merchant of Venice”?
—No. When and where does the story ______ ?
| A．take up | B．take on | C．take place | D．take off |
The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |