------Hey, Emily, I’ve got a used copy of our chemistry textbook for half price.

------ I’m afraid you ____ your money. Yours is the first edition, but we’re supposed to be using the third edition.

A．had wasted

B．were wasting

C．wasted

D．will waste

This is the second time I _____ by him; I shall never trust him again. [ ]

A. was put down

B. have been let down

C. have been put down

D. am let down