[听力原文]
M: The pen costs $13, but I only have $7.
W: I have $6. Would you like to borrow it

How much will the woman lend the man（）

A．To tell Bob he won’t be free tonight.
B．To ask whether Bob has left or not.
C．To tell Bob there will be a lecture tomorrow afternoon.
D．To ask Bob whether he will be free tonight.

A．金属在诸多特性中以强度最为重要。
B．具有强度的金属有多种用途。
C．金属有许多有用性能，其中强度最为重要。
D．金属坚硬耐磨才是其最重要的性能。