21.Tom owns _____ large collection of _____ books than any other student in our class.
A. the; / B.. a; / C. a; the D. /; the
22.To be frank, our supply of food ________. We should get some immediately.
A. is running B. is running out C. is being short D. is taking out
23.---What were you like when you were younger?
--- When I was a kid, I was kind of ________ .
A. ugly B. short C fat D. immature
