Answer:
x to do y statement
Explanation:
In (the work), (the author) uses _____x________ to show ______y_____.
x is usually a device while y is usually the purpose or theme
Explanation:
Instructions are given by the teacher.
18)My sister who lives in San Francisco<u><em>, </em></u> is a chemist!
19)My sister who is a doctor , lives in London!