Giúp em với ạ 1.The tree is very high. Its branches should be cut down( combine sentences usinh relative pronoun) 2. the cup of coffee is on the table. You wanted it(combine sentences usinh relative pronoun) 3. The boy speaking english very well. His bike i brrowed (combine sentences usinh relative pronoun) 4. I am reading the boook. I buoght it in london in 1999 (combine sentences usinh relative pronoun) 5. How did you know the woman? I met her at Ass conference(combine sentences usinh relative pronoun) 6. The fence which surrounds my house is made of wood( reduce relative clause) 7. Lan is the second student who entered the classroom this morning( reduce relative clause) 8. The psychologists who study the nature of sleep have made important discoveries (reduce relative clause) 9. He was the only man who reached the top(reduce relative clause) 10. The movie was interesting. We went to it( preposition + relative pronoun) 11. I couldn’t understand the woman. I talked to her on the phone(preposition + relative pronoun) ................HELP ME.....