Grandpa used to tell us something about the “Cultural Revolution” ________he had time to spare.
Put everything ________to you in your bag, not others.
As is known to all language learners, newly learnt words will soon be forgotten unless ______ used in everyday communication.
Judging from his face_______ there was a confident smile, we knew that he didn’t lose heart.
As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks.
Tom’s score on the test is the highest in the class. He _____.