I don’t know why he ________ in the middle of a sentence.

— How is your sister?— She _______ quite good after the operation, but she is taking a turn for the worse today.

He ______ his sister to give up the plan for cycling along the Mekong River, but failed. 

Not until he went through real hardship ________the love we have for our families is important.

The telephone _____ three times in the last hour, and each time it _____ for my sister.