A brilliant idea occurred to him, ___ to his research in the lab.
| A．while devoting | B．while devoting himself |
| C．while he was devoted | D．while devoted |
—Would you mind if I turn on the TV?
— .
| A．No, you can’t | B．Yes, please |
| C．No, go ahead | D．Yes, thanks |
We will be shown around the city: schools, museums, and some other places, _____ other visitors seldom go.
| A．what | B．which |
| C．when | D．where |
--- Is Bob still performing?
--- I’m afraid not. He is said _______ the stage already, as he has become an official.
| A．to have left | B．to leave |
| C．to have been left | D．be leaving |
．_______ we can afford it, we wouldn’t go abroad for our vacation.
| A．As long as | B．Whenever |
| C．Even though | D．In case |
While shopping, people sometimes can’t help _______ into buying something they don’t really need.
| A．to persuade | B．persuading |
| C．being persuaded | D．be persuaded |