根据句子中所给的单词首字母或中文提示，填写正确的单词。
⑴I like to see a movie. Do you know what's on at the  c this evening?
⑵They have to  w  their school uniform in the school on weekdays.
⑶The  f   is very dirty. You should sweep it every day.
⑷Please  p   up the rubbish and throw it into a dustbin.
⑸You're clever. Your answer to this question is  c  .
⑹My brother was    (生气的) with me because I broke his favorite camera.
⑺The T-shirt is very (便宜的). The old woman will take it.
⑻I can   (借给) you the bike, but you must return it to me today.
⑼–Where is the post office?   –It's  (在对面) from the library.
⑽This physics problem isn't difficult. Many students can work it out  (容易地).