at one's own pace；day in，day out；originate from；range from…to…；date back to；pass on…to；take on

（1）Outbreak investigations have indicated that the novel coronavirus most likely

originated from

originated from

wild animals.
（2）I hope you spend some time learning that these ideas are worth spreading，and then

pass on

pass on

them

to

to

other people who can make a difference.
（3）Stonehenge is one of the world's most famous prehistoric monuments

dating back to

dating back to

over 5，000 years ago.
（4）He is fed up with doing the same thing

day in，day out

day in，day out

.
（5）The national park has a large collection of wildlife，

ranging from

ranging from

butterflies

to

to

elephants.
（6）The son asks his dad why the chameleon（變色龍） can

take on

take on

the color of its background.
（7）It is a beautiful park，where people can easily have all the walks

at their own pace

at their own pace

without a tour guide.