“在…上”造句

这个男孩在上小学的时候就初次显示出成为运动员的潜力。
The boy first showed promise as an athlete in grade school.

我在上大学时懒得要命。
I never did a stroke of work at college.

我在上大学前空闲的一年里周游了世界。
I went around the world in my gap year.

• #在…上