一Would you be so kind as to take this heavy box upstairs for me?一
After having finished mopping the floor, he puts the mop back ______ it belonged.
The sooner one _____ to the new working conditions, the better it will be _______ his working efficiency.
The car ran into a crowd of middle school students, _______ to hospital immediately.
. —I have to get to the post office by six o’clock, but it is almost six now.— . This clock is fifteen minutes fast.
Do you know the professor in home we stayed?