单项选择题

There are thirty sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentence.
Mark your answers on your answer sheet.

I walked too much yesterday and _______ are sill aching now.

A. my leg’s muscles

B. my muscles of leg
C. my leg muscles

D. my muscles of the leg