--- I don’t know if he ____. --- He’ll come if it ___.
-I guess you must be very excited about having the chance to go travelling abroad! -____________,but I am afraid I am not good at English.
-Who will be the winner of the speech contest? -No one can know the result until it ____________tomorrow morning.
The lovely girl had all the flowers ____________, didn’t she?
-Can I go to the hospital to see Grandma now? -No, you can’t. It’s _________the visiting hours. Let’s see Grandma tomorrow. She won’t mind that.
Obama is ____________ the first black president of the USA. A. known asB. known of C. known for D. known to