问题
_____ three influenza type A virus subtypes（子类型） have been found in pigs．
A:where you are convenient
B:As far as
C:So far
D:Till far
B:As far as
C:So far
D:Till far
正确答案是：
同类题型
____Joseph off at the airport, Sally finished her work earlier.[ ]
High technology is used in EURO 2016 to the matches are fair enough in France.
_____time goes by, my grandfather’s memory seems to get worse and worse
Did you find your watch yesterday — No，I didn’t find________，but I’ve bought_______．