根据句意，用括号中所给单词的适当形式填空。
1. —When will you celebrate the success of the match? —On the_________(twenty) of this month.
2. After watching this programme, you will realize the_________(important) of learning English.
3. Mike, tell them not to climb the rocks, or they may hurt_________(they).
4. You will be_________(welcome) if you speak loudly in the reading room.
5. —What does Frank often do at weekends?
—He often_________(go) to the cinema with his parents.
6. Andy _________(argue) with his brother when I went to see him yesterday.
7. In summer, Miss Xia would rather_________(wear) trousers than a skirt.
8. He likes singing. He________often________(hear) to sing in the next room.
1. twentieth 2. importance 3. themselves 4. unwelcome
5. goes 6. was arguing 7. wear 8. is... heard