When you are home , give a call to let me know you ______ safely.
Some tourists think that the beauty of mountains is greater than ______ of deserts.
We've got two TV sets, but we still can't watch anything because ______ works properly.
--- Did you find the pen yesterday?--- No, I didn’t find ________, but I have bought ________.
All of us want very much to see these amusing movies,especially you referred to just now.
______ has already been pointed out, only by correcting mistakes, can you make progress.