Jack is the right person you can rely on to ____ the research when you are on vacation for the next two weeks.
A. carry on B. focus on
C. take up D. insist on
He failed the final examination and only then ____ how much time he had wasted.
A. he realized B. had he realized
C. he had realized D. did he realize
Recently, however, scientists have been finding that long-term use of these fertilizers can cause damage to the land, thus _____it less fertile.
A. make B. to make
C. made D. making
When the area was _______ by the flood, the government organized people to send food and medicine there immediately.
A. cut away B. cut down
C. cut off D. cut up
People should ______the traffic rules when they travel to a new place. Nobody can be exception.
A. perform B. observe
C. possess D. support
So far, some advanced teaching equipment, together with three hundred new books, ______ to those schools in the faraway area.
A. has been sent B. have been sent
C. was sent D. were sent
