—Is there anything wrong with you, Jake? You look so pale.—I feel very tired.I _____on this boring paper every day so far this month.
Since entry into high school the students have been ____ staying up late in the evening and getting up early in the morning.
—Was it under the tree _______ you were away talking to a friend? —Sure. But when I got back there, the bike was gone.
----How did you like Nick’s performance last night? ----To be honest, his singing didn’t _______to me much.
Some insects ______ the colour of their surroundings to protect themselves.
Mothers holding jobs outside the home should have _______ schedules to make it easier to care for their children.