_____ he met with the difficulty did he realize the importance of group work.
| A．Even though | B．Never until | C．Only before | D．Ever since |
—Cathy，did you attend the lecture given by Mr．Black last night？
—No．I ______ a report at the office．
| A．was writing | B．wrote |
| C．had written | D．have been writing |
---Don’t tell me you’ll have a dinner date again. ---______.I didn’t mean to.
| A．You meant it. | B．You made it. |
| C．You guessed it. | D．You deserved it. |
—I’m worried about the coming test! —______, you can do it!
| A．Don’t mention it | B．come on |
| C．Well done | D．Not likely |
— I’m sorry．I ________ at you the other day．
— Forget it．I was a bit out of control myself．
| A．shouldn’t shout | B．shouldn’t have shouted |
| C．mustn’t shout | D．mustn’t have shouted |
No matter how much knowledge you have, if your subject is at all ______, be careful when discussing it during your speech, or you may well offend your audience.
| A．diverse | B．sensitive |
| C．abstract | D．original |