问题补充:
Mr Wang does what he can us improve our English.
A. help
B. helped
C. helping
D. to help
答案:
A. help
B. helped
C. helping
(答案→)D. to help
解析:根据题干,本句的意思是“王老师做了他能做的来帮助我们提高我们的英语。”本句中的what 是does的宾语,he can 是what的定语,当定语是2个词时或2个以上词时,则定语后置。故用to help us improve our English是目的状语。所以本题选D。