she gave me another piece of advice ( )was of great importance to my recent research work.

问题描述:

she gave me another piece of advice ( )was of great importance to my recent research work.
A wether B since C where D what
2.i really admire my boss,especially the way ( ) he answers the customers' questions
A in that B which C / D why

1.正确答案是that/which,来引导定语从句,修饰advice.that/which在从句中作主语.而你的句子中没有正确选项.what、since不可以引导定语从句.
2.正确答案选C.因为way作先行词后面的定语从句缺少状语时,可以用三种形式来引导that/in which/不填 .
如果是第一小题有错误,希望你告知我啊!