She was always _____ , even when things were at their worst.
A. attractive B. optimistic C. pessimistic D. frightened
This also keeps the air，soil，water crops________ chemicals.
A.out of B.out from C.free of D.rid of
____polite to others and you can get friendship in turn.
A. Be B. To be C. Being D./
There are many tall old trees____ in and around our school.
A. stood B. to stand C. standing D. being standing
A quarrel _________, which made him ______ his family.
A. was broken out; break away
B. broke out; break away from
C. was broken away; break down
D. broke down; break out
Though he was _______,he looked down upon those who had a lot of money.
A.well off B.rich C.badly off D.well-known
