It is rather ______ that we still do not know how many species there are in the world today.
#59576
A
misleading
B
embarrassing
C
boring
D
demanding
推荐题目
What___ it is to have a cold drink after an _____ game! 
#19258
A
fun, exciting
B
a fun, exciting
C
funs, excited
D
fun, excited
Come and see me whenever ____. 
#18827
A
you are convenient
B
you will be convenient
C
it is convenient to you
D
it was he convenient to you