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             （them）．

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 l went to see him yesterday．

7．In summer，Miss Xia would rather                 （wear）trouser than a skirt．

8．He likes singing．He                  often                （hear）to sing in the next room．