48. Please open all the windows here.  Will _________________________________________________________________________________________________? 49. Can you buy some food for dinner tonight, please ?  Would you mind ________________________________________________________________________________________ 50. The girls who are playing chess are Nga and Hoa  The girls_______________________________________________________________________________________________ 51. Penicillin can cure many dangerous diseases.  Many __________________________________________________________________________________________________ 52. We must pay the bill at one  The bill________________________________________________________________________________________________ 53. The girl is very friendly. She is wearing a blue dress.  The girl ________________________________________________________________________________________________ 54. I want you to open the window.  Do you ________________________________________________________________________________________________ 55. “ Don’t throw things away”, Ms Linda said to her students Ms Linda asked _________________________________________________________________________________________