阿摩線上測驗
17. Yellowstone National Park was the first national park in the U.S. It _______in 1872.
(A) established
(B) had established
(C) was established
(D) has been established
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統計： A(39), B(73), C(287), D(90), E(0) #2722235
統計： A(39), B(73), C(287), D(90), E(0) #2722235
詳解 (共 2 筆)
NIAN LEE
#5464236
過去簡單式：was/were +vpp
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