12. There are enough nigh schools in this city. Adults can be educated no matter _____old they are.
A、how
B、what
C、when
D、where
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 _____