The package must be wrapped carefully before it is post.
A. The package
B. must be wrapped
C. before
D. is post
Giải bởi Vietjack
Chủ ngữ it (the package) không thể thực hiện được hành động post (gửi) nên ta phải chia động từ ở vế này ở dạng bị động
Câu bị động thì hiện tại đơn: S + is/ am/ are + Vp2
Sửa: is post ->is posted
=>The package must be wrapped carefully before it is posted.
Tạm dịch: Gói hàng phải được gói cẩn thận trước khi nó được vận chuyển.
Đáp án cần chọn là: D
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