—I didn’t attend the lecture yesterday.—I ______, either, if my mother hadn’t reminded me.
. Don’t be discouraged. ______things as they are and you will enjoy every day of your life.
Please do remember that if you fail, make ______failure a stepping stone to ______success.
---I feel terrible ,but I’ve just broken your ashtray.---_________, for I had meant to change it.
The great contributions he made______our country is_______worth remembering.
The theory _____ by Einstein was later to prove true, but at that time few people could accept it .