题目内容
Tom and David are both my good friends．David seems very serious, ________ Tom has a good sense of humor．
[ ]
A．
when
B．
where
C．
which
D．
while
答案：D
练习册系列答案
相关题目
题目内容
Tom and David are both my good friends．David seems very serious, ________ Tom has a good sense of humor．
when
where
which
while