A survey has shown that 40% of those killed in traffic accidents ________ if they had been wearing seat belts.
The computer system has ______ .
_______ found by the police, the killer had to hide themselves in a mountain cave for two months.
On top of the hill _______ the old man once lived.
I’m glad that my parents have _______ of me buying a new car.
— How can I improve my English? — Only by reading a lot _______ progress in English.