______ was not until the early 20th century _____ the importance of his ideas was realized.
A．What; that B．It; that C．That; so D．It ;when
The on-line diary blog is a cultural _____, perhaps as essential as usual books we read.
A．network B．phenomenon C．competition D．occupation
Jackie made _____ possible for this family to have beautiful memories during hard time.
A．it B．this C．that D．what
Only after he realized the significance of mastering two languages ______ English carefully.
A．did he set about learning B．did he set out learning
C．had he set about learning D．had he set out learning
If you had arrived half an hour earlier, you _____ the well-known writer in the flesh.
A．had met B．would have met C．would meet D．could meet
This is perhaps one of _____ important reasons why so many people write ____ poetry.
A．a ; the B．the ; the C．the; 不填 D．a; 不填
