Jack offered us a big meal when he was leaving the office, but our work ____, we refused it.
---- When did the couple die? ---- It was on May 12 _______ the earthquake hit Wenchuan County.
----Mr. Hu, have you finished correcting the papers? ----Not yet, the papers _______. You _______ get the results from me by tomorrow.
I must have been a great _____ to my parents in those hard days, for I never failed to live up to their expectations.
As most of you seem confused, now I’m going to the __________ measures.
A great deal of advanced science and technology has been ______ since China carried out the reform and opening policy.