－_____do you go to the library?－Once a week.

Millie goes to the Reading Club _________ a week.

---Would you like _____bread?--- No, I don’t want to eat _____.

Alice explains things very well, what she says can be understood very ＿＿＿.

---Do you think the last problem in this math test difficult?---Yes. I could        work it out.