Cấu trúc : Câu bị động ở thì Hiện Tại Hoàn Thành - QKĐ - HTTD
$11$.That box hasn't been opened for the past hundred years.
$12$.Many houses have been destroyed by the fire.
$13$.The chairs are being carried into the house by the children.
$14$.He was awarded the Nobel Prize for medicine in 1946.
$15$.He was seen to leave the office at 6 o'clock this morning.
$16$.Why wasn't the accident reported sooner?
$17$.Some of my books haven't taken.
$18$.A cake is being cut with a sharp knife by Mary.
$19$.The woman with a red hat was looked at by the children.
$20.$The victims have been provided with food and clothing.