题目内容
The chemistry teacher asked the students ________ more attention _________the lab clean.
A.to pay ,to keep B.to paying ,to keeping
C.to pay , to keeping D.paying ,keeping
C
练习册系列答案
相关题目
题目内容
The chemistry teacher asked the students ________ more attention _________the lab clean.
A.to pay ,to keep B.to paying ,to keeping
C.to pay , to keeping D.paying ,keeping
C