Tourism, _______ it brings in money to a country, can also result in damage to the World Heritage sites there．
| A．once | B．while | C．if | D．as |
--- Hello. Can I help you?
--- Hello. My name is Yang Yan. We have a ________ for the party tonight.
| A．relation | B．reservation | C．reception | D．restriction |
I am ________ about what I say because careless remarks are likely to hurt others’ feelings
| A．enthusiastic | B．concerned | C．cautious | D．doubtful |
--- You have made a promise to go with me to Nanjing. So why aren’t you getting ready?
--- But I ________ that you wanted me to start at once.
| A．haven’t realized | B．hadn’t realized | C．didn’t realize | D．don’t realize |
Our class will go to the National Park next Sunday ——________ it rains, of course.
| A．when | B．unless | C．for | D．whether |
The German athlete, ________ several attempts to beat the world record in high jumping, decided to have another try.
| A．to make | B．having made | C．making | D．made |