Question

—They will have an          holiday after the exam.
—Great.
A. one-day                                          B. eleven-day                               C. eight day’s

Answer 1

B

修飾名詞表示時間可用“數詞—名詞”來表示，相當于形容詞，an后所跟的單詞第一個音應該為元音，eleven第一個音為元音，故本題選B。