Question 1: Make friends/make friends.

Question 2: Go for a walk.

Question 3: Around the world

Question 4: In his? way

Question 5: Visitors

Question 1: like to do or like to do means like to do something, and making friends means making friends, so fill in the blank of this sentence to make friends.

Question 2: the modal verb can is followed by the prototype of the verb, and go for a walk means walking, so this sentence is full of go for a walk.

Question 3: The whole world can use the phrase the whole world, and a finite noun can be placed after the noun, so fill in the blank of this sentence with the whole world.

Question 4:on a one' s way to means on the way to a place, so this sentence is full of on way.

Question 5: visitors means tourists, and more tourists should use the plural form of tourists.