单选题 7.Doing your homework is a sure way to improve your test scores, and this is especially true______ it comes to classroom tests.

A、 after
B、 as
C、 when
D、 before

【正确答案】 C

【答案解析】when／if it comes to sth“当谈到；如果涉及”，如：Joe is not good in sports，butwhen it comes to arithmetic，he is the best in the class；If it comes to building，Austins is thefirm you should consult．