Judging from what has happened here, it’s high time that we _______effective measures to prevent this.
Mary, it's already 7 0'clock I'm afraid there is not much time ________for you to ________ for the ball.
They arrived at the farmhouse, in front of which________. A is sitting a boy B. sat a boy C. a boy sat D. a boy is sitting
All possible means ________been taken to prevent the river________.
The government is considering the environment-friendly plan which some scientists would like to see________soon.
________late, but also he forgot his books.