“探究光对鼠妇生活的影响”的实验过程中,光是这个实验的其中一个变量。[ ]
×
— Where is Jenny?
— She is doing her homework ______ the classroom.
A.of
B.on
C.in
D.to
---There is something wrong with my laptop. How can I repair it?
--- Well, that’s easy. Look at the ?
A.explanations
B.expressions
C.instructions
D.introductions