题目内容：

 

1. Mr and Mrs Brown are learning Chinese by    (they) these days.

2. Our teachers are always    (friend) to us and often help us with our lessons.

3. A lot of   (visit) come to Suzhou to enjoy the beauty of the city every year.

4. My dad goes to work as    (usually) on Sundays. He's busy all the time.

5.Tom was so    (care) that he left his keys at home.