appeal to，work as，for instance，be based on，be of great use，be allergic to

（1）Jenny studied painting from 1926 and also

worked as

worked as

a commercial artist.
（2）There are jobs more dangerous than truck driving；

for instance

for instance

，training lions.
（3）A dictionary

is of great use

is of great use

for students to learn a foreign language.
（4）This music is too old-fashioned to

appeal to

appeal to

young people any longer.
（5）The advice

is based on

is based on

the wisdom of a team of heart specialists.
（6）What we want to know is whether he

is allergic to

is allergic to

this medicine.