—Sandra failed to pass the exam.
— __________ ? Nobody works harder than she does.
| A．How come | B．How about | C．Why not | D．What for |
Our English teacher is ill, and we are all ______ her health.
| A．careful of | B．concerned about | C．interested in | D．calm about |
Mrs. Johnson, our neighbor, often ______ the dog in the park after supper.
| A．watches | B．takes | C．keeps | D．walks |
They soon ______ doing the same thing day after day, and finally gave up.
| A．got tired of | B．got along with | C．got away from | D．got down to |
I like to listen to music ______ I’m having a walk in the evening.
| A．since | B．after | C．while | D．before |
______ the terrible pollution, so many beautiful fish are fast disappearing in the river.
| A．According to | B．Because of | C．Because | D．As a result |