21．Sometimes we are asked ________ the likely result of the event will be.
A．that what we think B．what we think C．that we think D．what do we think
22．The book which ________ at the end of last year turned out to be a great success in Shanghai.
A．came about B．came up C．came out D．came around
23．Bless your heart, I know you didn't break the vase ________. Don't cry!
A．on purpose B．by accident C．on business D．by mistake
