No one has yet succeeded in explaining the ___ of how life began.
#6736
A
cause
B
problem
C
reason
D
puzzle
推荐题目
She made a in our plan to play basketball when it started to rain.
#5142
A
turn
B
switch
C
point
D
exchange
In our hometown, a private school was closed down as a _______ of its terribly bad management.
#6551
A
matter
B
consequence
C
whole
D
total
A month’s _____ is required from whichever party wishes to end the agreement.
#7300
A
message
B
letter
C
sentence
D
notice