Every year _____ money and energy is spent on environment protection.
| A．large quantities of | B．a large number of |
| C．a large quantity of | D．a plenty of |
I’m going to Europe on vacation together with John if I ________ find the money.
| A．can |
| B．might |
| C．would |
| D．need |
The door ________ open, no matter how hard she pushed.
| A．shouldn’t |
| B．couldn’t |
| C．wouldn’t |
| D．mightn’t |
No one ________ be more generous; he has a heart of gold.
| A．could |
| B．must |
| C．dare |
| D．need |
They were determined to carry out the plan at first, but then we ________ persuade them to change their minds.
| A．would |
| B．could |
| C．were able to |
| D．had to |
—Could I use your pen?
—Yes, of course you ________.
| A．might |
| B．will |
| C．can |
| D．should |