______ the cause, they were able to propose to a remedy.

I have not gone to see the doctor for a long time, but ...

单项选择题I have not gone to see the doctor for a long time, but today______

I ______ half an hour before she came out of the teleph...

单项选择题I ______ half an hour before she came out of the telephone box and I entered.

The mother didn't know who ______ for the broken window...

单项选择题The mother didn't know who ______ for the broken window.