—Look, John‘s fallen asleep at work!—Oh, he must have ________ late last night.
Li Ling was a diligent boy . He ____ go to school though it was raining hard .
— ____ he open the door ? — Yes , please .
— Do you have to take care of your mother at home ? — Yes , I ____ .
— Would you please go to the cinema with me ? — Yes , I ____ .
I''m surprised that he ____ to help me when I needed his help .