The belief ________ people find it more convenient to stop on Sundays ________ in the research.
| A．that; was proved |
| B．that; were proved |
| C．which; proved |
| D．whether; proved |
Accustomed to ______ the steep mountains， he had no difficulty reaching the top.
| A．climbing | B．climb |
| C．having climbed | D．have climbed |
Not until he left his home ______ to know how important the family was for him.
| A．did he begin | B．had he begun |
| C．he began | D．he had begun |
—Come on, please give me some ideas about the project.
—Sorry, with so much work ______ my mind, I almost break down.
| A．filled | B．filling |
| C．to fill | D．being filled |
Some customers accuse Toyota ______ being slow to fix the car problems, which makes them disappointed.
| A．in | B．at |
| C．with | D．of |
Zheng He's first stop during the expedition was in ______ is a part of Vietnam today.
| A．where | B．what |
| C．which | D．that |