Ben was busy taking a training class. ______we had to wait for himfor half an hour..
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
-When shall we meet again, next Wednesday or Friday? -____________day is OK. It’s not a problem to me.
I went over what I have writ ten again and again ____________ I wouldn’t make any mistakes.