Can you explain how it _______ that you missed the morning classes?
A. came across B. came to
C. came up D. came about
The engine of the car was out of order and the heavy rain the helplessness of the couple.
A. added to B. resulted from
C. turned out D. made up
________ down what the expert will say at the meeting, will you? Which of the following is not right?
A. Put B. Set
C. Write D. Take
That was the fourth time that Mr. Smith __________the Summer Palace.
A. has 
visited B. visits
C. had visited D. to visit
Americans and Canadians can understand each other ______ they don’t speak the same kind of English.
A. now that B. even if
C. as if D. only if
_____ of the students who took part in the military training _____ 450.
A. A number, is B. A number, are
C. The number, are D. The number, is
