______ nobody else at hand, I had to carry the heavy box to the eighth floor by myself.
An increase in the price of drugs has __________ the rising cost of medical care.
We __________ the old scientist __________ his contribution ________ the country.
The reason __________ he refused to attend the meeting was that they didn't give him an invitation earlier.
The reason __________ he explained was __________ he was ill and unable to go to school.
Last week I bought a cellphone,__________ was very reasonable.