If nothing ________, the oceans will turn into fish deserts.
#100592
A
does
B
had been done
C
will do
D
is done
推荐题目
—Bob, you______ on the phone.   —______. 
#104322
A
areneeded;I'mcoming
B
arewanted;Coming
C
arecalled;I'llcome
D
arerungup;Thanks
As time _______ on, Sally began to wonder if Bruce ________ Bilk’s new poem called Tabled’ Hute.
#104286
A
has gone; had read
B
went; has read
C
goes; has read
D
went; had read