A、The C programming language has (A) one of the most (B) programming languages, and it has been implemented on most personal computers and multiuser systems, especially those designed for research and development. It evolved from the version described in Kernighan and Ritche's work (called "K&R C" after the authors into(C) variants, including the standard ANSI C, which (D) many type-checking features and includes a standard library. Of the two main (E), K&R C is probably the most commonly used on multiuser computers, with ANSI C close behind in the personal computing world, ANSI C is far more common.
B、A～E:
C、① much ② variants ③ complex ④ incorporates ⑤ several
D、⑥ become ⑦ popular ⑧ editions ⑨ come ⑩ users