— Why _____ these cards ______ orange?— Because orange can cheer you up.

—What happened? I called you several times yesterday evening, but I couldn't get through.—Sorry, my sister and I ________ on the phone all the time.

---Do you know our town?--- No, this is the first time I ________ here.

—What ________ to the boy a moment ago? —The knife cut his tiptoe.

If I find his phone number, I_______ you.