Question

I haven’t been learned to operate a computer, ________ playing net games．

1. A.
   let alone
2. B.
   not to mention
3. C.
   not to say
4. D.
   not to speak

Answer 1

B
let alone表示“更不用说”，在此句中接playing; not to say“简直可以说”；D项改为not to speak of也对。