— It’s a long time ______I saw you last.— And what is a pity now that it will be a long time______ we see each other again.
When______,the museum will be open to the public next year.
—Could you help me change the wheel,sir? —______,madam,which one?
Reading is______good habit.Stick to it,and you'll make______great progress.
I really appreciated______the views of your hometown-Kaili for me.
Thanks to the invention of the mobile phone,people can now keep in______with each other quite easily.