问题
选择题
13. ___ had they reached the 30th floor ____ they realized that they had forgotten to take the key.
A．Hardly; than
B．Hardly; when
C．No sooner; when
D．No sooner; then
答案
B
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13. ___ had they reached the 30th floor ____ they realized that they had forgotten to take the key.
A．Hardly; than
B．Hardly; when
C．No sooner; when
D．No sooner; then
B