---Answer the doorbell, please. It must be your uncle. ---It __Heidi. She’s coming over this morning to help me with my math.
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?