21. —Do you still remember my son. Jimmy?
—Oh, yes, but he sure up beyond recognition.
A. grows B. has grown C. is grown D. is growing
22. Doing your homework is a sure way to improve your test scores, and this is especially true ______ it comes to classroom tests.
A. before B. since C. when D. after
23. Online information helps you a lot with house-hunting. But you can’t really tell if you’ll like a place________ you see it.
A. where B. since C. when D. until