单项选择题

The two scholars worked at the task of writing a preface to the new dictionary for three hours _____ last night.

A．at length
B．in full
C．on end
D．in time
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单项选择题
When Langston waited to be saved by Jesus, he saw the lighted candles in the altar _____ in the draught from the opening window.
A．flickering
B．fluttering
C．shivering
D．wavering
单项选择题
Maggie tiptoed over and took the clock away because she hated to hear it _____ when she was trying to go to sleep.
A．sounding
B．humming
C．ticking
D．ringing
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