問題詳情
18. While watching television, __________.
(A)the doorbell rang
(B)the doorbell rings
(C)we heard the doorbell ring
(D)we heard the doorbell rings
(A)the doorbell rang
(B)the doorbell rings
(C)we heard the doorbell ring
(D)we heard the doorbell rings
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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