It took me half _______ hour to finish my homework last night.( )
A.aB.anC.the
Chinese learning is popular with people all over______world.( )
a
/
the
It's time______class. Lets go into the classroom.
OK.( )
for
of
in
找出画线部分与其他单词发音不同的选项.( )
knee
knock
kilo
autumn
August
aunt
worse
storm
north