--This history book is of great value.--Exactly. However, ____can be enjoyed from it _____you have a deep understanding of it.
—Hi, Lucy. Have you finished your homework yet? —No, just a half. I am really bored with so much homework. —_____
I didn’t have _____ to say, so I said _____.
—Have you _____ had dumplings? —No, not _____.
The shoes were worn out, what’s more, they aren’t worth _____.
—Hello! May I speak to Alice? —Sorry, she _____ Shanghai.