Sometimes nobody closes the door before leaving because everybody thinks ________ will do it.
A:anybody
B:everybody
C:somebody
D:nobody
下列选项中,既是光合作用的原料,也是呼吸作用产物的是( )
关于食物链的写法,以下正确的是( )
Our team tried our best, ________ we failed the match at last.