根据句子意思，用括号中所给单词的适当形式填空。
小题1:For her ▲ (twelve) birthday, Jenny invited her teachers and classmates to her house.
小题2:—How was your visit to Nanjing Confucius Temple at the weekend?
—Wonderful! My parents and I enjoyed ▲ (we) very much there.
小题3:After several ▲ (week) study, the American students found Chinese interesting to learn.
小题4:You can see the ▲ ( happy) on her face because she can’t find her lovely cat.
小题5:When a little bit of rain falls, the plants hold the water. Without plants, the land can become a desert much ▲ (easy).
小题6:—May Day is coming, would you like to go ▲ (climb) with us?
—Why not, I’d love to go to Zijin Mountain.