Some house plants grow better if placed near a window with plenty of sunlight ______ others prefer to be in a more shaded spot.
| A．unless | B．since | C．when | D．while |
When I was a child, I ________ watch TV whenever I wanted to.
| A．should | B．could |
| C．must | D．need |
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 |