To learn a language is certainly easier than to make a rocket.
To walk to school is certainly safer than to ride a bike to school.
To take a plane to get to Beijing is certainly quicker than to talk a train to go there.
To learn a language is certainly easier than to make a rocket.
To walk to school is certainly safer than to ride a bike to school.
To take a plane to get to Beijing is certainly quicker than to talk a train to go there.