It _____ for an emergency generator to require paralleling.A.is usualB.is not usualC.is ne

No punishment is too severe for such an ______ crime. It is almost impossible to understan

She took an umbrella with her for fear that ______ .A．it rainsB．it should rainC．it rainedD

Take an umbrella with you _________ it rains.A、in any caseB、in caseC、becauseD、for

For long－time efficiency and happiness it is best to observe the _____ of health an

Generally it takes courage for an aged person __

A simple way to_______funds would be to offer an incentive program for the donors.A.genera