--Have you ever been to Beijing?---Yes, and I still remember ___ there when I was a little boy.

—We didn’t find the Blacks ________ the lecture.—No one had told them about ________ a lecture the following day.

These clothes are very dirty.They need ___.

—What made you so____ ____？—John's not listening to my advice.

Tom admitted ______ in the examination and he was not admitted _____ the school at last.