求这2道题的翻译及解释The______expression on his face suggested that he

求这2道题的翻译及解释
The______expression on his face suggested that he was not able to work out the ______problem.
A.puzzling;puzzling B.puzzled;puzzled C.puzzling;puzzled D.puzzled;puzzling
The audience waited until the curtain rose and then________laughter at the sight of the funny actor.
A.burst out B.burst into C.broken into D.began with