.The boys often help the old c_________________ water and sw

.The boys often help the old c_________________ water and sweep the floor.
.— Oh,it’s broken.— Don’t worry .Let me r it.
.Look!They are s but not the same.
.The Physics exam is coming .Our teacher c us for it every day.
.He has gone abroad for p___________________ not on business.
.The dog f_________________ the stick that we had tossed (扔).
.Tom went into his room and s___________________ his door behind him