10. What are you _______? A: talking about B: talking to C: talking with D: talking at

The author is _______. A: talking on the phone B: talking on the television C: talking on the radio D: talking on the platform

What are they talking about A: They are talking about a project. B: They are talking about a product. C: The are talking about profit.

What are they talking about A: [A] They are talking about the man’s vacation. B: They are talking about their vacation plans. C: They are talking about the weather.

What are they talking about A: [A] They are talking about building a house. B: They are talking about their modern house. C: They are talking about making things.

What are they talking about A: [A] They are talking about Sally. B: [B] They are talking about their math test. C: [C] They are talking about their English test.

The doctor _______ is leaving for Africa next month A: the nurse is talking to him B: whom the nurse is talking C: the nurse is talking to D: who the nurse is talking

Economist often say there is no such thing as afree lunch. What do economists mean whenthey say such a thing? A: Economists,in this case, are talking about common resources. B: Someresources cause significant negative externalities. C: Even ifsomeone literally offers you a free lunch, there is an opportunity cost to theresources that are used to produce your free lunch. D: Peoplenever offer a lunch for free.

-- ______Jack______on the phone again?Yes. He often ______ on the phone for an hour. A: Does; talk; talks B: Is; talking; is talking C: Is; talking; talks D: Does; talk; talking

What is she talking about？－She is talking to Mary。（)