--- 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.
A.has worked B.had worked
C.worked D.has been working
They turned out more than 1,000 washing machines, most of which ________quality.
A.is good B.are good C.is of high D.are of high
--- Did you visit the zoo?
--- No, we_______have visited it, but we spent too much time shopping.
A.shouldn’t B.can’t C.could D.must
The letter from his girlfriend he had been looking forward to _________yesterday.
A.came B.comes C.coming D.come
Jack, it’s________bad manners to blow your nose at________table.
A.the; a B.the; / C./; the D./; /
--- What do you think of their marriage?
--- _________, if I were Kate, I would not marry him.
A.Generally speaking B.Believe it or not
C.To my surprise D.To be honest
