Please do me a favor —_____ my friend Mr. Smith to Youth Theater at 7:30 tonight.
--- This returned Chinese scholar has become one of the top experts in this field. --- Yes, I know him very well. He_________in Africa on wild animals for eight years.
.They turned out more than 1,000 washing machines, most of which ________quality.
-- Did you visit the zoo? --- No, we_______have visited it, but we spent too much time shopping.
.The letter from his girlfriend he had been looking forward to _________yesterday.
.Jack, it’s________bad manners to blow your nose at________table.