1. Xiao Ming is the student _____ pronunciation is the best in our class.
A. who B. whom C. whose D. his
答：c。whose关系代词在从句中傲定语．定语从句中应用关系代词，故不用人称代词D项．
2. She heard a terrible noise, _______ brought her heart into her mouth.
A. it B. which C. this D. that
答：B。在非限制性的定语从句中只能用which，不能用that。
