Two (of the players) from the Yankees (has) been (chosen) (to participate) in the All Star game.

单项选择题Before TV, the common man (seldom never) (had) the opportunity to see and (hear) his leaders express (their) views.

单项选择题It is essential that the temperature (is not) elevated (to a point) where the substance formed (may become) unstable and decompose into (its) constituent(组成的) elements.