Section ADirections: In this section, you will hear 8 short conversations and 2 long conve

Section A

Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.

(12)

A．He can't explain some concepts of engineering.

B．He regularly gives talks to high school students.

C．He doesn't want the woman to postpone the talk.

D．He hasn't finished preparing for his presentation.