It is not yet known how these huge stones were conveyed a distance of 380 kilometres 3 000 years ago.
The headmaster’s words are quite _____.
--Do you often hear John ___ in his room? --Yes. Listen! Now we can hear him ___ in his room.
The scientist suggested ____ the experiment in a different way.
It’s bad for your eyes ____ computer games for a long time.
A policeman saw two thieves ____ a girl’s mobile phone on a bus and he caught them at once.