–The classroom is_____ clean_____ it was yesterday.--Sorry, I forgot to clean it.
There’s _______with your watch because it often keeps bad time.
Bob is looking at the _______to find where Beihai Park is.
—Shall we invite our English teacher to the food festival? —That’s a good idea! But I ____ think she ____ come.
Jenny’s teeth are not good, because she ____.
—I lost my MP3 on my way to school this morning. —____ You must be careful next time.