19. The federal government asked that vaccinating all students _______ done soon; however, there are still many unvaccinated students as of today.
(A) had been
(B) be
(C) have been
(D) were

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詳解 (共 1 筆)

#6441731
正確答案是:✅ (B) be 【解析】 ...
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私人筆記#6571674
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正確答案:(B) be 翻譯:聯邦政府要...
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