A:Until
B:Unle
C:Since
D:While
—Mrs. Black, I'm afraid that I'll fail the exam.
—________, dear! Take it easy. I'm sure you'll pass it.
①____v. 意思是 ②____n. 重要性 ③____n. 决定
④____n. 死 ⑤____v. 义务做,志愿者 ⑥____n. 标志
⑦____n. & v. 通知 ⑧____adj. 孤独的 ⑨____pron. 几个
⑩____adj.强烈的