rather than，in shape，keep track of，make a comment on，clean up，take over，build up

（1）He went to the park in the evening

rather than

rather than

in the morning.
（2）I will help

clean up

clean up

the roadside litter whenever possible.I hope my behavior will make a difference.
（3）When Shania was 21 years old，her parents were killed in a car accident.She had to

take over

take over

the role of parent to her younger sisters.
（4）I would like to

make a comment on

make a comment on

the plastic bags which we use in our daily life.
（5）The woman keeps

in shape

in shape

so she never eats after 9：00 pm.
（6）Taking notes is an excellent way to improve your concentration and to

keep track of

keep track of

a speaker's ideas.
（7）This will help them

build up

build up

a sense of responsibility since young.