I didn’t know this years ago ,but recent science ____that inharmonic marital(婚姻的) life like quarrels or fights harms one’ heart.
The reason _______ he didn’t come was _______he was injured.
My parents _______ have arrived at suppertime but their flight was held up due to the heavy fog.
The manager believes prices will not rise by more than _______ four percent.
—Thank you for joining in our conversation tonight.—_____.
He is a difficult person, for he ___________________ about everything.