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____ the temperature falling so rapidly, we couldn't go on with the experience.

A. Since   B. With    C. As    D. For

____ the temperature falling so rapidly, we couldn't go on with the experience.

A. Since             B. With              C. As                 D. For

.____ the temperature falling so rapidly, we couldn't go on with the experience.

A. Since   B. With    C. As    D. For

____ the temperature falling so rapidly, we couldn't go on with the experience.

A. Since   B. With    C. As    D. For

____ the temperature falling so rapidly, we couldn't go on with the experience.

A. Since   B. With    C. As    D. For