. She _____ on this essay for twenty minutes but she has written only about a hundred words.
| A．will be working | B．worked | C．has been working | D．will have worked |
I should not have laughed if I ________ you were serious.
| A．thought | B．would think |
| C．had thought | D．have thought |
The door ________ open, no matter how hard she pushed.
| A．shouldn't | B．couldn't |
| C．wouldn't | D．mightn't |
(2013·天津，9)No one ________ be more generous; he has a heart of gold.
| A．could | B．must |
| C．dare | D．need |
（2013·辽宁卷) everyone here，I wish you a pleasant journey back to your journey.
| A．By means of | B．On behalf of | C．In search of | D．For fear of |
The Smiths are praised _______ the way they bring up their children.
| A．from | B．by | C．at | D．for |