—I would like to pick up your sister for you. But I don’t know her. _____?—A middle-aged woman with a round face, wearing a red blouse.
They form a polar molecule, ____ is, ____ with a slightly positive end and a slightly negative end.
They find themselves surrounded by colorful rocks, fishes, seashells and plants, all ____ slowly in the blue water.
Even though the pure water is ____ gives sea water its main properties, the salinity of sea water affects both its weight and freezing point.
Mike is Mrs.’ pet student, ____ all her students no one else is as nice as he.
He came running along and climbed ____ the train just as it was about to leave.