21. --- Has ______ English changed over time?
--- “No”, he answered without ______ second thought.
A. /; the B. /; a C. the; the D. the; a
22. If my brother doesn’t go camping, _______.
A. so will I B. so do I C. neither will I D. neither do I
23. Iraq has _______ too many wars since 1990s, making his people suffer a lot.
A. gone through B. looked through C. got through D. passed through
