It was not until the subprime loan crisis(次贷危机) ____ great damage to the American financial system that Americans ____ the severity of the situation.
By the time you have completed the essential training, you _____ exposed to virtually every new feature of the course.
The police are looking for a missing boy who is believed ______ a white pullover and blue jeans.
To _____ good relationships with your teachers and classmates ,you should learn to share ups and downs with them.
If I hadn’t stood under the ladder to catch you when you fell, you _____ now.
What an amazing ______! I was thinking about my cousin Lily when she phone me.