It is required that the machine___as frequently as necessary. A: will oil B: be oiled C: is oiled D: will be oiled

It is required that the machine ______ as frequently as necessary. A: be oiled B: must be oiled C: is oiled D: will oil

What happened on June 23, 2000 A: The oiled birds began to emerge from the Gulf of Mexico. B: 10,000 penguins were oiled and half of them died. C: A ship named the Treasure sank off the coast of Cape Town. D: A ship named the Apollo Sea sank near Dassen Island.