A. are
Đáp án C
Bị động trong quá khứ: They were (tobe) often beautifully (adv) illustrated (V-ed)
Dịch: Chúng thường được minh họa bắt mắt.
Ann's encouraging words gave me _________ to undertake the demanding task once again.
In the US the first stage of compulsory education _________ as elementary education.