21. The place where the general had been buried was finally discovered, marked by _______ alone on a small stone.
A. a 45-number B. a number 45th C. the number 45 D. the 45-number
22. Look! My suit is badly out of _______. There must have been somebody sitting on it.
A. date B. balance C. order D. shape
23. Great scientists do not _______ graduate from top universities. Exactly, some attend school only a year in all.
A. usually B. necessarily C. extremely D. formally
