come into use，focus on，for instance，take turns，no alternative to，be rich in，switch to，put down

（1）What would you do，

for instance

for instance

，if you found a member of staff stealing？
（2）He got tired of teaching and

switched to

switched to

writing stories.
（3）In class，it is not essential to

put down

put down

every word the teacher says.
（4）Everyone should protect his eyes.There is

no alternative to

no alternative to

them.
（5）It's good to eat more animal livers（肝臟），which

are rich in

are rich in

Vitamin A.
（6）The new bridge will

come into use

come into use

next month，which will bring much convenience to the local villagers.
（7）All the schools

take turns

take turns

to hold the sports meeting every year.
（8）With the noise going on，only a minority（少數(shù)） of students can

focus on

focus on

study.