If you don’t keep the meat in the refrigerator on such a hot day, it may ____.
| A．go out | B．go away | C．go off | D．go down |
Taking medicine only gives you _______ relief from pain, so I suggest you have an operation.
| A．flexible | B．optional | C．temporary | D．beneficial |
It was nothing but his ten years of hard work that _______ his success in his research.
| A．referred to | B．applied to | C．led to | D．appealed to |
_______ only one week left before the final examination, we’re kept busy going over our lessons.
| A．For | B．As | C．Since | D．With |
— Why not join the football club?
— I’d love to, but I’m afraid it will _______ too much of my time.
| A．take up | B．make up | C．hold up | D．pick up |
_______ with the size of the whole earth, the highest mountain does not seem high at all.
| A．Compare | B．Comparing |
| C．When compared | D．When comparing |