Perhaps the most important quality (shared) by all notable scientists is a strong determination (to solve) a problem, when it (arises) or to seek an explanation for a (phenomena).

单项选择题Many drama critics (considered) Richard Burton's interpretation of Hamlet superior (than) Sir Lawrence Olivier's version (produced) several years (earlier).

单项选择题Exploratory investigations reveal that Alaska is capable (to produce) 45 to 55 percent of (its own requirements) of agricultural products, (instead of) approximately to percent, (the quantity) now produced.