Mary______ a lot of Spanish by playing with the native boys and girls.
It surprised us all ________ Kate made such big progress in this final exam.
________ some teenagers don't realize is ________ difficult life can be after they get addicted to drugs.
_______ didn't attend the lecture yesterday won't be given full marks.
It could be learned from the teacher's eyes ________ he was very satisfied with her performance.
—How will you deal with these papers, Ann?—I will leave them to ________ takes over the job.