As many as 150 people died in the explosion. If only the owners ____ enough attention to the safety measures!
A. paid B. should pay
C. would pay D. had paid
—Mike has played a lot of computer games recently.
—Yes, that might ___ his failure in the mid-term examinations.
A. Account for B. answer for
C. ask for D. stand for
Only those, as Albert Einstein once said in one of his famous books, ______ attempt the absurd can achieve the impossible.
A. who B. which
C. whose D. where
It is not until he returned to his hometown ______ the great changes that had happened.
A. did he find B. that he found
C. that did he find D. found he that
Donald Trump made a _____ to the nation that he would struggle for lower taxes and improve health care after taking office.
A. contribution B. commitment
C. devotion D. donation
______ Jack Ma has stepped down as chairman of Alibaba, he still remains on its board of directors.
A. Since B. Before
C. While D. Until
