What great trouble we had ____ where his house was.
Robert failed to seek a job for his poor education, though he is _______ to get one to support his family.
More highways have been built in China, ______ it much easier for people to travel from one place to another.
As he reached ______ front door, Jack saw ______ strange sight.
—Excuse me, I wonder if you can help me?— Sure. ______ ?
---Please sit down and have a break. You have been working for three hours.---No, thank you. _____.