We teachers must see to ________that every student can understand.

I would like to buy some good English reference books, but _______ was available from the bookstore, where I only found some Chinese ones.

I got this bicycle for ______．My friend gave it to me when she bought a new one．

---What else do you want?---          else. I think I have got everything ready.

--- One’s week’s time has been wasted. --- I can’t believe we did all that work for __________.