题干
--- Dr. Saxena, a knowledgeable and ever victorious physician, has been down in the dumps these days for his experiment failed again.
--- Every one has his _____ and he is not exceptional.
--- Every one has his _____ and he is not exceptional.
| A．Achilles’ heel | B．Daniel in the lion’s den |
| C．Herculean task | D．Waterloo |
答案(点此获取答案解析）
