It was three months later _____ he completed the jobwith difficulty.

I _____ sooner but I didn’t know that they werewaiting for me

When asked by the teacher in class, he freely _____ the mistakes in his composition and promised to correct them at once.

It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words.

Nowadays _____ mails are used more and more frequently. [ ]