当前位置: X题卡 > 所有题目 > 题目详情

_________not clearly known how many animal species are in the danger of dying out.

查看本题答案

你可能感兴趣的试题

have they known; get    have they known; were going to get    do they know; are going to get    had they known; got  
would win   had won   will win   won  
better-known  well-known  best-known  most-known  
Not known how to do it  Unknown what to do  Our Knowing not how to do  Our not knowing how to do it  
Having not known  Not having known  Not knowing  Being not known  
had they known  have they known  would they know  did they know  
Not known how to    Unknown what to do to    His knowing not how to    His not knowing how to  
How long    How often    How many    How much  
clear;clearly   clearly;clearly   c  
known   aware   realized   seen  
How far  How often  How long  How soon  
Not known how to  Unknown what to do to   His knowing not how to  His not knowing how to  
discussing;know   discussed;know   discussing;knowing   discussed;known  
learn how to do research and write papers  have some learning experience  learn about the course concretely and clearly  know how to participate in discussions  
knew; were    had known; were    knew; had been    had known; had been  
Not knowing   Having not known   Not having been known   Not known  
that; what    which; what    that; how    which; how  
Pardon    How are you    How do you do    Yes,please  
Know   Knowing   Having known   Being known  

热门试题

更多