问题
选择题
Mr. Smith _____ these days. I think he should take a holiday before he burns out. |
A. has been overworking B. overworked C. had overworked D. was overworking |
答案
答案:A
Mr. Smith _____ these days. I think he should take a holiday before he burns out. |
A. has been overworking B. overworked C. had overworked D. was overworking |
答案:A