The question that puzzled them is ____ they can get rid of the air pollution in the area.
#84871
A
how is it that
B
that is how
C
what is that
D
how it is that
推荐题目
 It was ______ yesterday ______ that Portugal had beaten North Korea in theWorld Cup.
#85362
A
not until; did I learn
B
until; that I learned
C
not until; when I learned
D
not until; that I learned