—Why does the lake smell terrible?—Because large quantities of water .
--- Are you sure you have to ? It's been very late. --- I don't know _____ I can do it if not now.
---Would you please tell me _________? --- In a small village near Niingbo.
The photograph will show you ________.
--- Can you guess if they _______ to play basketball with us? --- I think they'll come if they _________ free.
---Where does he come from ? --- Pardon? --- I asked where_________. A…. did he come from B. he came from