单词拼写

(1)      I have a piano _________(课) this Saturday.

(2)      Can I ask you some questions about your vacation ________ (计划).

(3)      The students of Hong Shanhu come to school  by ________(船).

(4)      78. When we are t_______, we should drink some water.（口渴的）

(5)      79. Thank you for your i________ to visit next week.（邀请）