After starting work, Cao spent his evenings _____ in his books and was eventually admitted to a secondary technical school.
---Will you walk a little faster? ---I was afraid you could not _____ .
Our teachers promised to attend our class meeting, but they haven’t ____ yet.
Your article will have to be _____ to fit into the magazine.
---What’s wrong with Jane? ---A letter from home _____ an attack of homesickness.
The students were told to _____ their English before going abroad.