--Hello, Sandy. This is Jack. What are you doing?---I’m watching a match. It started at 7:00 p.m. and _____ on for another an hour.
This problem is so tough that only______ students can solve it.
Although you have lots of difficulties, you must ______your work.
He _____get up late, but now he gets up earlier.
Nothing can ______ the girl from _____ there.
---Are you going to go shopping this afternoon? ---No,I'm _____ tired _____go.