When she realized I _________ her, she quickly made a pose, smiling.
| A．was photographing | B．photographed |
| C．had photographed | D．will photograph |
Many people are taking part in various outdoor activities ______themselves.
| A．refreshed | B．to refresh | C．being refreshed | D．having been refreshed |
At the end of the race his legs ____ and he fell down on the ground.
| A．gave out | B．gave off | C．worn out | D．used up |
I can’t remember when ______ turning point occurred exactly, but it might be ______summer morning when I was in New York.
| A．不填；a | B．a; a | C．the; a | D．a; the |
I ________ the main point of the speech and wrote a summary of it.
| A．grasped | B．misunderstood | C．mastered | D．recognized |
—We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.
— I really should have gone with you, but I ________ on some remaining problems.
| A．was working | B．would work | C．worked | D．had worked |