1) Companies have to respond the changing economic climate.
CORRECT! RESPOND TO SB/STH
2) The boss persists our working on Saturdays.
CORRECT! PERSIST IN STH
3) David says he forgot our anniversary.
CORRECT! FORGET ABOUT STH
4) Scientists have found a way to communicate dolphins using a hydrophone.
CORRECT! COMMUNICATE WITH SB/STH
5) Please apply in writing the CAA for a permit.
CORRECT! APPLY TO SB/STH FOR STH
6) He's crazy! He bet his whole salary one horse.
CORRECT! BET ON STH
7) Look the machine quite carefully before you buy it.
CORRECT! LOOK AT STH
8) The country declined importance in the eighteenth century.
CORRECT! DECLINE IN STH
9) They never managed to escape the burning house.
CORRECT! ESCAPE FROM STH
10) He forgave her telling lies.
CORRECT! FORGIVE SB FOR (DOING) STH