Mark _____while he _____ up and down.
举一反三
- Mark _____while he _____ up and down. A: falls ... is jumping B: fell ... was jumping C: was falling ... was jumping D: felt ... was jumping
- Bob's leg got hurt _______the Purple Mountains. A. while he is climbing up B. while he was climbing up C. while he had climbed up D. while he climbed up A: B: C: D:
- The computer system _____ ___ suddenly while he was searching for<br/>information on the Internet. A: broke down B: broke out C: broke up D: broke in
- He bent down to study the footprints and then he ________ (straight) up and looked around.
- 7. He paused to take ( ) of the situation. He ( ) down to study the footprints and then he ( ) up and looked around.