We need to take action instead of waiting here for problems________.
---It was Sunday today, and I _______ up very early. ---So you really had a good rest.
By the time he arrived in Beijing, we _______ there for two days.
The professor could hardly find sufficient grounds________ his arguments in favor of the new theory.
Along with the email was my brother’s promise ______ I came first in the competition, he would buy me an MP4.
"We can’t go out in this weather," said Bob, ________ out of the window.