二手资料是指在该课题的调研之前已经存在的、自己或他人为其他目的收集到的相关或不相关的资料。
参考答案：对
连词成句。
1. is dinner the mom cooking in kitchen
.
2. you call is dad there a for
3. everybody is how doing
?
4. am I a book reading
5. father an writing is my e-mail
The newly built cafe′， the walls of ________ are painted light green, is really a peaceful place for us,
specially after hard work.[ ]
A．that
B．it
C．what
D．which
