A direct order like “ Daisy, pass me the book” sounds rude. We’d better say: “________”

A. Daisy, could you please pass me the book?

B. Daisy, I wonder if can you pass me the book.

C. Daisy, give me the book!

D. Daisy, I wonder you can pass me the book.

------ I wonder ______ you’ll water this kind of tree.

------- Once a week.

—I wonder_______ you’ll water this kind of tree．

—Once a week．

A．how often　　　 B．how long　　　　 C．how soon　 　　D．how much