【单选题】

Questions 11 to 14 are based on the following passage.At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.

How long will the sucking of the mosquito lastA．Less than 8 seconds.
B．No more than 12 seconds.
C．8 to 10 seconds.
D．About 5 seconds.