Mr. Smith graduated from college at the age of 23, and ___________ he has been working as a teacher in a middle school.
_______ in a top-level university abroad is what many students wish for.
We won’t go to the park if it ______ tomorrow.
Jack is the most intelligent man____ I’ve ever met.
While______ in Scotland, he made friends with the native there.
--- Have you really been to visit the Bird’s Nest in Beijing? ---- I ______ it last summer vacation.