Since computers were first introduced in the early 1980s, technology ____ a great deal.
(A) changes
(B) changed
(C) has changed
(D) had changed

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統計： A(2), B(27), C(252), D(120), E(0) #382820

詳解 (共 1 筆)

#692978

(ever) since...後面若接從屬子句時，子句內的動詞用「過去式」(V-ed)。

另一邊的主要子句用「現在完成式」(have/ has + PP.)
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