soon you [ ]a senior high school student.isn't it exciting!a become bwill become c became d have become.

soon you [ ]a senior high school student.isn't it exciting!a become bwill become c became d have become.
soon you [ ]a senior high school student.
isn't it exciting!
a become bwill become c became d have become.

soon you [ ]a senior high school student.isn't it exciting!a become bwill become c became d have become.
选择B will become
在不久的将来,你将成为一名高中生.