用所给词的适当形式填空。

1  Thank you for your _______   (invite).

2.  On Wednesday, she has tennis_______  (train) with the school team.

3.  The boy often_______ (train) his pet dog to stand on its hind(后部的)legs.

4.  This evening Sonia is going to her_______  (cousin) birthday party.

5.  Do you want_______ (go) _______  (swim) with us Saturday afternoon?

6.  Would you like_______ (come) to my office _______ (discuss) the report?

蕨类植物种有不少种类为重要的观叶植物，除了采用（）繁殖外，也可采用孢子繁殖。