$11.$ The child got over a lot before recovering completely.
$⇒$ Thì QKĐ: Thường: S + V2/ed
get over = go through (v): vượt qua
$12.$ The doctor want to go over the test results with his patient.
$⇒$ S + want to V: muốn làm gì
go over (v): kiểm tra, rà soát
$13.$ Luckily nobody was injured when the bomb went off.
$⇒$ Clause 1 (Thì QKĐ: Tobe: S + was/were + O) + when + Clause 2 (Thì QKĐ: Thường: S + V2/ed)
go off (v): nổ
$14.$ I looked for my keys everywhere but I couldn't figure out where I put them.
$⇒$ Thì QKĐ: Thường: S + V2/ed
look for (v): tìm
$15.$ Although he tried to eat less, he built up during the holidays.
$⇒$ Although + Clause 1 (Chỉ nguyên nhân, Thì QKĐ: Thường: S + V2/ed), Clause 2 (Chỉ kết quả, Thì QKĐ: Thường: S + V2/ed)
build up (v): tăng lên, tăng thêm