The one concern for parents and students is ______ if the student pursues their university education in a foreign country, the student will not have the opportunity to establish social contacts in China.
Our English teacher is ill, and we are all ______ her health.
Mrs. Johnson, our neighbor, often ______ the dog in the park after supper.
They soon ______ doing the same thing day after day, and finally gave up.
I like to listen to music ______ I’m having a walk in the evening.
______ the terrible pollution, so many beautiful fish are fast disappearing in the river.