We often take part in after class activities(活动).I like to play ____ basketball , but my brother likes to play ____ guitar .
School students ________ smoke because it is against the school rules.
_____ great fun it is to make a snowman in winter.
The flight to London wasbecause of the heavy snow.
Tom is weak in physics. He always feels _______ before he takes a physics test.
Ann is a careful girl. She always goes over her exercises to____ there are no mistakes.