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I. Complete the following sentences with the best choice.
1. ______ he is a hard-working man, he has not been successful in business.
A. Although
B. Since
C. Unless
D. After all
2. She keeps a supply of candles in the house in case of a power ______.
A. shortage
B. omission
C. absence
D. failure
1. ______ he is a hard-working man, he has not been successful in business.
A. Although
B. Since
C. Unless
D. After all
2. She keeps a supply of candles in the house in case of a power ______.
A. shortage
B. omission
C. absence
D. failure
