The first week of university is an exciting time freshmen familiarize themselves with their college and make new friends.
A. that
B. when
C. what
D. on which
网友回答
A. that
(答案→)B. when
C. what
D. on which
解析：句中an exciting time是先行词，其在定语从句中作时间状语。故用when。句意：上大学的第一周是令人兴奋的时光，在这段时间里大学新生熟悉他们的学校并交新朋友。