The light bulb ______ by Edison in the middle of the 1780s.
—What’s his name? —. A、His is Bill B、It’s Bill C、He is Bill
What’s thatEnglish? A、at B、on C、in
—What’s this? —It’sorange. A、a B、an C、the
—What color is your pen? —It’s. A、black B、a blue C、a yellow pencil
—Are the keys yellow? —. A、Yes, it is B、No, they aren’t C、Yes, she is