问题补充：
Unless you speak English yourself, you’d better take a translator with you.
A. If you speak English yourself, you’d better take a translator with you.
B. you’d better not take a translator with you if you speak English.
C. You’d better take a translator with you if you don’t speak English yourself, .
D. If you don’t speak English yourself, you’d better not take a translator with you.
答案：
A. If you speak English yourself, you’d better take a translator with you.
B. you’d better not take a translator with you if you speak English.
(答案→)C. You’d better take a translator with you if you don’t speak English yourself, .
D. If you don’t speak English yourself, you’d better not take a translator with you.
解析：句意：除非你自己说英语，你最好带个翻译。Unless除非，结合句意选C，你最好是带个翻译，如果你自己不会说英语的话。
