How_________I help them to understand when they won’t listen to me?
| A．can | B．would | C．may | D．must |
The film is very humorous but_________can be enjoyed unless you understand English culture.
| A．everything | B．something | C．nothing | D．anythingh |
—Your composition is full of mistakes.
—I wish I _________more careful.
| A．would have been | B．had been | C．would be | D．were |
．_________life began on the earth is one of the biggest puzzles to scientists.
| A．How | B．What | C．Where | D．That |
．—Let’s throw a surprise party for mom’s 50th birthday.
—That’s a good idea. We_________several of her friends.
| A．invite | B．had invited | C．are inviting | D．will invite |