Check what you have written _______ you hand in your application form.
句意：在递交申请表之前，先检查你所写的。
考查从属连词辨析。since自从；before在……之前；after在……之后；while当……时候，根据句意，可知应在递交申请表之前，先检查下你所填写的，所以用before，故选B。
Check what you have written _______ you hand in your application form.
We still know little about the Moon _____ men have landed on it.
The movie Nezha is_______ educational ____ I want to see it again.
You can surf the Internet ______ you want to know more about the 2020 World Middle School Games.
—How time flies! The middle school life is coming to an end.
—Yes. We have to say goodbye, ________ our friendship will last forever.
Mike and Jim's room is tidy, ______ their sister's not.
Our English teacher is nice and patient she is very strict with us.
Even if we learn something well, we will forget it ______ we use it.
Wash your hands before meals, ______ you may get ill.
—Who went to the graduation party last night, Mary?
—Almost everyone did. ______ lots of students _____ Ms. Wang appeared at the party.
