Professor Smith, along with his assistants, _________on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
33. I cannot understand__________the boy alone.
| A．why she left | B．why did she leave | C．why she had left | D．why had she left |
32. Jenny_____________a rich man. She has_____________him for five years.
| A．married with, married with | B．married, married |
| C．married to, been married | D．married, been married to |
31. The chance I had been looking forward to_______at last.
| A．coming | B．come | C．came | D．Comes |
30. Although I admire you_____your work on soil, I think you should apologize_______the villagers for being the water pollution.
| A．for, to | B．to , for | C．for , for | D．to, to |
29. He hurried to the booking office only__________that all the tickets had been sold out.
| A．to tell | B．to be told | C．told | D．telling |