Samuel was _____ why few of his friends attended his birthday party.
A. spotted B. crashed C. puzzled D. limited
_____ life exists on any other planet in the solar system still remains a question.
A. Why B. Whether C. How D. Where
Later, the naughty boys _____ to the English teacher for having played a trick on her the other day.
A. apologized B. introduced C. reminded D. stared
The company is deep in _____, so you’d better avoid dealing with it.
A. benefit B. thought C. debt D. strength
—I met your uncle on my way to school this morning.
—Ah? You _____ be joking. He flew to Germany yesterday evening!
A. might B. should C. could D. must
It was almost midnight when a big fire _____ in the neighborhood.
A. blocked out B. turned out
C. broke out D. died out
