_______ all the inventions have in common is _____they have succeeded. A. What; what B. That; that C. What; that D That; what
Would you be kind enough to help the boy _____ Chinese is really hard to learn?
_____ in the library regulations that any book borrowed be returned by due time, or the borrower will be fined.
—How did you like the concert last night ? —I enjoyed it very much, but the dancers _____ a better job.
I appreciate _____ the opportunity to work in your company two years ago.
_____ economic, political and cultural differences, it is difficult for China and America to fully understand each other.