The meeting is about to start, yet the speaker hasn’t turned up.— No one knows ____.

They were singing and dancing to _____ their high spirits though it was very cold.

Tom seems not so enthusiastic as he was two years ago.–YesHe’s reached a point in his career_________ he has to decide what to do next

Our English teacher , having explained to us how to design a project, allowed us a whole week’s preparation and then ______the class

Some insects ________ the colour of their surroundings to protect themselves.[ ]