The conference was attended by more than 11,000 people, _____ it the largest UN climate change gathering ever held.
| A．making | B．to make | C．made | D．to be making |
Many students listened to the lecture, but I wondered how much they.
| A．took out | B．took up | C．took off | D．took in |
The customs office isyour luggage is inspected when you enter or leave a country.
| A．where | B．when | C．why | D．who |
We are proud of our hometown, which isin coal and natural crystal（水晶石）.
| A．abundant | B．universal | C．remote | D．autonomous |
However much you have done, you ought tothe help you’ve received from others.
| A．donate | B．acknowledge | C．conduct | D．guarantee |
The girls in the photograph are twins,is my classmate in high school.
| A．the taller of them. | B．the taller of whom. |
| C．the tallest of that | D．the tallest of who |