All we are required to do ______ record a "weike" where we explain what we think students are puzzled about.
Fifty-six ______ twenty-seven makes eighty-three.
. Which of the following is wrong? This book is easy enough for ______.
. ______ was done by the girl students.
There are ten boxes on the desk and the ______ is yours.
What ______ heavy snow. Let's go out for a walk in ______ snow, shall we?