阿摩線上測驗
13. Bacterial spores germinate and sprout _____ favorable conditions of temperature and food supply.
(A) when encountering of
(B) when they encounter
(C) when they will encounter
(D) when they encounter of
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統計： A(27), B(168), C(8), D(14), E(0) #3278145
統計： A(27), B(168), C(8), D(14), E(0) #3278145
