单项选择题
The headlights of the approaching car were so _________ that the cyclist had to stop riding.
单项选择题 According to biologists, animal populations at a given time are _________ by food supplies at that time.
单项选择题 The boy slipped out of the room and headed for the swimming pool without his parents'__________.
单项选择题 She _________ being spied on when she was sunbathing in the garden.
