23. After working until midnight for two weeks, he finally_________and had to stay in the hospital.
| A．broke up | B．gave in | C．broke down | D．gave up |
---Your iPad looks nice. Can I borrow it?
---__________.
| A．Help yourself. | B．Go ahead |
| C．Out of the question | D．Come on! |
The door burst open and________, shouting with anger.
| A．rushed in a crowd | B．in rushing a crowd |
| C．in rushed a crowd | D．in a crowd did rush |
He doesn’t think the question of ________they are boys or girls is important.
| A．if | B．whether | C．which | D．that |
________to the victims of the earthquake, you can contact the local charity organizations.
| A．Contributing | B．To contribute |
| C．Being contribute | D．Contributed |
After suffering a heart attack, Michael Jackson was pronounced dead, ________a tragic end to the world’s most popular entertainer.
| A．marked | B．to mark | C．marking | D．having marked |