The look on his face suggested that he just happened _______ the secret and _______ he himself was very shocked, too.
The couple give ________ attend their 50th wedding anniversary some gifts to share their happiness.
So touching_____ that I couldn’t hold my tears back when I heard it for the first time
Frequent smoggy weather has set the alarm ringing; by no means can we develop economy _____ the environment.
The English play _____ my students acted at the New Year’s party was a great success.
If you _____ regret things you did or didn’t do in the past, then you won’t be able to move forward.