With his attention________on the shops along the roadside，he knocked an old man down while riding to school.

A  concentrating     B．concentrated     C．to concentrate      D．concentrates

答案　B

解析　考查词组，故选B项。

-----Did Mr Black resign his post as principal?

  -----No,________ was telling a lie.

  A. whoever told you that   B. those who told you that

  C. No matter who told you  D. Anyone told you that

 A 句意：Mrs Black 辞去校长职务了吗？没有，不管谁告诉你的，他都在说谎。Whoever引导的主语从句，相当于anyone who。如果选B，则those作主语，谓语应用were。 C项引导让步状语从句，不能引导主语从句；D项错误，应改为Anyone who told you that。

—It’s wrong for a students to follow      his teachers say．

   —It’s true, I can’t agree        ．

A．whatever；more               B．no matter what; more

C．whatever;  much              D．no matter what; much

；no matter what只引导让步状语从句；I can’t agree more.表示“我再同意不过了”。