He tried to deal with the ever-increasing burden of his work，but finally _____ and had to take a complete rest.

Tim and I will visit the exhibition this weekend. Would you like to join us– .

Mr. Smith was ____ to break his habit of smoking after the medical examination last month.

do it right now, and you _____ have my helpwhen in trouble.

Your father was worried about something this morning. Why— He wondered .