The guard keeps watch at the gate.—So he does. Only those knows well could be let in.

Tomorrow is a holiday. Why are youdoing your homework —–I am doing these exercises now so thatI won’t have _____ on Sunday.

He used to __________ in a small village, but now he has been used to __________ in the big city.

Facing the enemies, Liu Hulan ______ .

105. These two signatures are so _____that it’s very difficult to ______ them apart.