20. —Why was __ you lost all your keys?—It was because of my carelessness.
Mrs. Li explains English grammar so_____ that even I can understand it.
I’ll do well in the exam with Mrs. Chen ______ me.
--- Shall I go to the meeting? --- You decide---- _______
The little girl _______ go to the cinema rather than _______ at home alone that night.
--- Look! Somebody has broken all the glass. --- It’s not me. I _______ that.