midway/ walk/ when/ certain/ slowed/ of/ the /suddenly /his /about/ a /block/ policeman
举一反三
- He _____(walk) to his car when he stopped. He suddenly _______(remember) that he _______(not lock) the door.
- The students was just about to ________ the questions, when suddenly he found the answer.
- I ____________ for about an hour and a half when suddenly I slipped and fell down a riverbank.
- When the old man _____ to walk back to his house, the sun ____ itself behind the mountain.
- I knew nothing about the accident _____ the policeman told me. A: whether B: when C: if D: until