用括号里所给的动词的适当形式填空。

One day, Mr. and Mrs. Han took their children to the seaside. They had a good time there. When it was time  1  （go） home, Mr. Han found that he had left his car key inside the car, which was locked.

      “What shall we do?” Mrs. Han said, ”we can’t get in. ”

While Mr. and Mrs. Han  2   (talk), a stranger, aged about 65, came to them.

“What’s wrong?” he asked. “Can I help you?”

“I hope so,” Mr. Han said.  “I   3   (leave) my key in the car.”

“Perhaps I can help you,” the stranger said. He went to his car and   4 (take) out a piece of wire(金属丝)。

       “My name’s Chen,” the man said. “I  5   (open) your door.”

      Luckily, Mr. Han left a small gap (缝隙) at the top of the window to stop the car from  6 (become) too hot. Mr. Chen used the piece of wire through the gap to pull up the knob which locked the door. The door  7 (open). Mr. and Mrs. Han thanked Mr. Chen. Mr. Chen was happy because he always tried to help somebody every day.