If Tom ______ an alarm, the thieves wouldn't have broken into his house.
A. was installed
B. to install
C. had installed
D. have installed
Ta dùng câu điều kiện loại 3 diễn tả một hành động không xảy ra trong quá khứ
Cấu trúc: If + S + had + Vp2, S + could/would + have PP +…
Tạm dịch: Nếu Tom đã cài chuông báo động, những tên trộm sẽ không đột nhập vào nhà anh ta.
Đáp án cần chọn là: C
If the sea water continues to be polluted, many fish species ______ extinct.
If you _____ to take a bus to school now, I ____ you a lift a little later.
The driver in front stopped so suddenly. Therefore, the accident happened.
If you want your tea sweeter, you _____ need to add some more milk or sugar.
We're going to start painting the house tomorrow_____ it's not raining.
If local people drink this untreated water, they _______ have cholera.