It is required that the machine___as frequently as necessary.
A: will oil
B: be oiled
C: is oiled
D: will be oiled
A: will oil
B: be oiled
C: is oiled
D: will be oiled
举一反三
- 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.
- It is required that the machine___ as frequently as necessary.
- Check the engine oil level and add if necessary．
- Ballast water can only be（）in cargo tanks in exceptional cases where the particular character of the operation of an oil tanker renders it necessary to carry ballast water in excess of the quantity required，provided that such operation of the oil tanker falls under the category of exceptional cases as established by the Organization.