We left the mother a note ____she was worried when she came back..选项:a、if b、so that c、in cas

问题描述:

We left the mother a note ____she was worried when she came back..选项:a、if b、so that c、in cas
We left the mother a note ____she was worried when she came back..
选项:
a、if
b、so that
c、in case
d、unless

C 以防