问题
选择题
— Where _____________ you just now?
— I _____________ in the library. [ ]
A. was; were
B. are; was
C. were; was
D. was; was
答案
答案：C
搜题请搜索小程序“爱下问搜题”
— Where _____________ you just now?
— I _____________ in the library. [ ]
A. was; were
B. are; was
C. were; was
D. was; was
答案：C
、③ CH3COOH三种有机物中，家庭中可用于除水垢的是____（填序号，下同），不溶于水的是_______，一定浓度的溶液可作为医用消毒剂的是____。