.Think about ___ you enjoy doing, and look for others that enjoy it too.
| A．what | B．which | C．that | D．whether |
If ________ to look after luggage for someone else, inform the police at once.
| A．asked | B．to ask |
| C．asking | D．having asked |
The famous musician, as well as his students, ________ to perform at the opening ceremony of the 2012 Taipei Flower Expo.
| A．were invited | B．was invited |
| C．have been invited | D．has been invited |
At no time ________ the rules of the game.It was unfair to punish them.
| A．they actually broke |
| B．do they actually break |
| C．did they actually break |
| D．they had actually broken |
Only by increasing the number of doctors by 50 percent ________ properly in this hospital.
| A．can be the patients treated |
| B．can the patients be treated |
| C．the patients can be treated |
| D．treated can be the patients |
It was only after he had read the papers ________ Mr. Gross realized the task before him was extremely difficult to complete.
| A．when | B．that |
| C．which | D．what |