1, C – are fined (câu bị động; chủ động “many people” là số nhiều -> chọn “are fined”)
2, A – was stolen (câu bị động; “last night” -> quá khứ đơn)
3, A - will be accomplished (câu bị động; thì tương lai đơn)
4, C - was penicillin discovered (câu bị động; thì quá khứ đơn)
5, B - being repaired (câu bị động, thì hiện tại tiếp diễn)
6, C - have been shown (câu bị động, “since June” -> hiện tại hoàn thành)
7, D - must be followed
8, D - used to be awarded
9, B - has just been told
10, D – are threatened
11, B - are going to be sent
12, B - The boy’s saving money was donated to help the poor.
13, C - The room is cleaned by the girl every day.
14, B - The regulations of preventing the disease are not violated.
18, D - A new hospital has been built for Covid-19 patients by local volunteers.
19, C - Their complaints should be sent to the head office.
20, B - Getting together in crowded places is being banned everywhere in Vietnam now.