阿摩線上測驗
6. While the ozone hole over Antarctica typically _____ in September and October, scientists observed in
October this year the smallest ozone hole since they first began observing it in 1982.
(A) growing
(B) grew
(C) grows
(D) is grown
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統計： A(30), B(25), C(23), D(11), E(0) #2136341
統計： A(30), B(25), C(23), D(11), E(0) #2136341
