937.It is a good idea to ask for a map at the information center,_______ may prove to be very useful before you start your tour of the museum.
A.where
B.which
C.who
D.that
938.The old lady is said to have three children,two of _____ studying abroad.
A.whom
B.them
C.all
D.who
937.答案是B;which指代前面的不定式。
938.答案是B;根据句式结构和下文studying判断，此处并非定语从句，而是独立结构，故应用人称代词，而不可使用关系代词。
