It’s the first time ______ he has helped us.
---It’s cloudy outside. Please take an umbrella. --- ______.
With so many people ____ the Internet, it is difficult to see online movies at the same time.
He hurried to the station, ____ to catch the last train.
---Why do you think he can succeed?---He believes in himself, ____ is the most important, I think.
What should you say when ___ to a stranger?