Stay healthy by eating well and exercising (a)   (REGULAR)

She stays so (a)   although she is 70 years old now (ACT)

1.        A  (a)   diet contains an adequate amount of all the nutrients required by the body to grow, remain healthy and be disease-free (BALANCE)

(a)   energy sources, such as solar and wind power, are crucial for reducing the use of fossil fuels. (RENEW)

Smart cities create environments where citizens can easily (a)   with various urban systems, such as transportation and public services. (INTERACTION)

Parents often encourage their children to follow their native country’s (a)   values. (CULTURE)

The doctor  (a)   her carefully, but could not find anything wrong. (EXAM)

Plants draw minerals and other (a)   from the soil. (NUTRITIOUS)

Life (a)   for both men and women has improved greatly in the past 20 years (EXPECT)