10. Mary demanded that he _____ the books he borrowed from her a month ago.
A、 return
B、would return
C、 returned
D、had returned
Directions:There are 15 incomplete sentences in this section. For each sentence there are four choices marked A, B, C and D. Choose one answer that best completes the sentenceand blacken the corresponding letter on the Answer Sheet.6–-Did you find the film boring?一-Not at all. It was _____