—Where is he exactly?—I don’t know, but I saw him _______ an experiment in the lab when I passed by.
---Do you know the girl with long hair?--I don’t think so, although she___me of someone I know.
We can’t afford a holiday, so we’ll just have to go____.
China sent up Shenzhou VII manned spaceship into spaceship successfully, which shows that science and technology ______ rapidly in China.
___his school work, he takes interest in anything.
We had to ______ our visit to the pyramids because we didn’t have enough time to see them before we left Egypt.