23. Many people wear face masks in a desperate attempt to protect themselves against the air they
breathe.
a. making an utmost effort b. making a nominal effort
c. showing little responsibility d。 showing earnest responsibilhty
24 The Swahili language took hold across Africa and beyond. Experts estimate it is spoken by more
than 100 million people.
a. stopped spreading b. was recreated
c. became common d. was officially adopted
