More than a dazen students in that school____abroad to study medicine last year.A.sent B.were sent C.had sent D.had been sent

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More than a dazen students in that school____abroad to study medicine last year.A.sent B.were sent C.had sent D.had been sent

More than a dazen students in that school____abroad to study medicine last year.A.sent B.were sent C.had sent D.had been sent
More than a dazen students in that school____abroad to study medicine last year.
A.sent B.were sent C.had sent D.had been sent

More than a dazen students in that school____abroad to study medicine last year.A.sent B.were sent C.had sent D.had been sent
答案B
是一般过去时被动态

B.were sent
过去式,被动语态

B.被动式的过去时

b 一般过去时