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106. The stone steps up to the mountain temple had been worn ______ by centuries of visitors from every part of the world.

A. smooth                 B .smoothly               C. old                       D. Broken

106. The stone steps up to the mountain temple had been worn ______ by centuries of visitors from every part of the world.

A. smooth                 B .smoothly               C. old                       D. Broken

106. The stone steps up to the mountain temple had been worn ______ by centuries of visitors from every part of the world.

A. smooth                 B .smoothly               C. old                       D. Broken

106. The stone steps up to the mountain temple had been worn ______ by centuries of visitors from every part of the world.

A. smooth                 B .smoothly               C. old                       D. Broken

106. The stone steps up to the mountain temple had been worn ______ by centuries of visitors from every part of the world.

A. smooth                 B .smoothly               C. old                       D. Broken