______full preparations, they thought it better to put off the conference till next week.
A. Not to have made B. Not having made
C. Not making D. Having not made
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
