WHEN FOOD AND GERMS COLLECT IN A SMALL CRACK , OUR TEETH…………..A. SE...

7. - E GIAO ANCAC DE THI THAM KHAO BGD&DTTHU VIEN BO DE THI TRAC NGHIEM CAC CD DHDE 2 DOC
Tiếng Anh E GIAO ANCAC DE THI THAM KHAO BGD&DTTHU VIEN BO DE THI TRAC NGHIEM CAC CD DHDE 2 DOC
7. When food and germs collect in a small crack , our teeth…………..A. send poison into the blood B. begin to decayC. become hardD. make us feel quite ill