________ small，the company has about 1,000 buyers in over 30 countries.
| A．As | B．If |
| C．Although | D．Once |
On the top of Mount Tai，you can get a wonderful________of the sunrise.
| A．view | B．scene |
| C．sign | D．sight |
Seeing the happy________of children playing in the park，I’m full of joy and confidence in the future of our country.
| A．sight | B．scene |
| C．view | D．sign |
After five hours’ drive，they reached________they thought was the place they had been dreaming of.
| A．where | B．what |
| C．which | D．that |
Professor Backman took up scientific research for decades，and this is________he devoted all his life to.
| A．which | B．what |
| C．where | D．how |
Sorry I’m so late，but you cannot imagine________great trouble I took to find your house.
| A．what | B．how |
| C．which | D．why |