68. Four foreign friends, each of them can speak 2 out of 4 languages: English, French, Japanese, and Chinese. One language is spoken by three of them, but there is no language that all of them can speak. It is also known that:
(1) A can speak Japanese, but D cannot, yet they communicate in the same language;
(2) B does not speak English, and when A and C communicate, he acts as a translator;
(3) B, C, and D cannot find a common language to communicate;
(4) None of the four can speak both Japanese and French.
The number of people who can speak Chinese is $\qquad$.
answer: 3