core/involve/ efficient/extinction/ smoothly/ embarrassment/predict
- No one exactly knows what led to the………….of dinosaurs.
- Instead focusing on details, we should get straight to the …………of problem.
- Parents should ………….their children more in making family decisions.
- My new computer’s much faster and more ……..than the old one was.
- There weren’t many cars in the street and the traffic was flowing………. .
- Helen changed the subject to save me the…………….of replying.
"مناسب برای معلمان، دانش آموزان و اولیاء"
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