It was in the lab ______ was taken charge of by Professor Harris _______ they did the experiment.
I will telephone you________I________your country.
You have been sitting on my hat and now it is badly out of________.
-My father is coughing heavily. -You'd better________.It's bad for his health.
When the family moved to Canada,the children________very quickly to the new environments.
If you ask the fast runner to set the pace,then most of them will be left________.