-Hello, Sandy. This is Jack. What are you doing? -I’m watching a match. It started at 7 p.m. and _____ on for another half an hour.
I will try my best to stop my son from _____ the same mistake.
–_____ did you work out the problem in such a short time? --With Mr. Li’s help.
They walked home last night because they couldn’t _____ to take a taxi.
–Why didn’t you buy any bread? --Sorry, I _____.
They all _____ Laura about building a museum here.