Suggested answers to Exercises 5:

S1: The robot is very useful. It can see, hear, talk and walk.

S2: Really? Could you explain how it sees?

S1: What I'm trying to say is that with a pair of video-camera eyes, the robot can avoid objects while moving around the home. It can measure distances and recognize the people that it meets.

S2: I see. What I don't quite understand is that how it hears.

S1: The robot has directional hearing. It will turn and look in the direction of the person who calls it. It will also understand and respond appropriately to a variety of spoken commands. Is that clear?

S2: Yes. Wonderful! How does it talk?

S1: In other words, the robot can greet you by name and respond when you speak to it. It will also announce incoming e-mail messages.

S2: I wonder how it walks. Could you explain it?

S1: Of course. The robot navigates around obstacles, while roaming through the house. Equipped with six ultra-sonic sensors, it stops instantly when something is very close or approaches suddenly from any direction.

S2: Thank you.

Step II Vocabulary: Phrasal Verbs

Help the students learn some phrasal verbs and use them correctly.

T: Now let's look at some verbs we have learned on the screen. Which of the verbs are phrasal verbs?

Show them on the screen:

assist, conflict, assess, click into, die of, carry out, lead to

T: Who can tell us the answers? Any volunteer?

S: Let me have a try. I think the verbs that are composed of two words are the phrasal verbs. They are "click into, die of, carry out, lead to".

T: Right. What you said just now is reasonable. Today we're going to learn the phrasal verbs. According to word formation and grammatical forms, English verbs may be divided into single-word verbs and phrasal verbs. A single-word verb is a verb that