根据中文意思,完成下列句子 (1)桌子上有一本书和两只笔。 There ______ a book and ______ pencils on the desk. (2)森林里有一些熊吗? ______ ______ any ______ in the forest? (3)我们学校有许多学生。 There ______ many students in our school.