Accustomed to___ the steep mountains,he had no difficulty reaching the top
| A．climbing |
| B．climb |
| C．having climbed |
| D．have climbed |
—The accident might not have happened, had we been more careful.
—But we ______.
| A．weren’t | B．didn’t | C．hadn’t | D．don’t |
—This returned scholar has become one of the top experts in this field.
—Yes, I know him very well. He ______ for ten years at an institute in the USA.
A. has worked B. has been working C. worked D. had worked
— Why are you so popular with your students?
— As a teacher, I seldom give my students so difficult a problem ____ they cannot work out.
| A．as | B．that | C．if | D．which |
—What does "___________" mean?
—That means, the things that people do mean more than what they say.
| A．Easier said than done | B．Actions speak louder than words |
| C．Honesty is the best policy | D．Constant dropping wears the stone |
Generally speaking, being hard-working is just ______ it takes you to be successful in your career.
| A．what | B．that | C．where | D．which |