It is surprising that such a young boy can swim ______ the river ______ 100 meters wide.
A. over; measured B. across; measuring
C. across; measures D. through; measuring
His English is improving _______, which makes both his parents and his teacher happy.
A. now and then B. little by little
C. sooner or later D. one after another
As he works in a remote area, he visits his parents only _______ .
A. anxiously B. occasionally
C. urgently D. hopefully
Here are the first three books of his poem works, with the fourth one to _____ next month.
A. come out B. publish
C. replace D. work out
_______every member has arrived, let’s set about _____ the plan for the next five years.
A. Since; to work out B. Because; work out
C. Now that; working out 
D. For; work out
His classmates offered him their congratulations ______ his successful performance.
A. at B. on C. for D. of
