After several days of social activities, I decided to       _ on my research on the human behaviors. 
#72745
A
fix
B
settle
C
set
D
concentrate
推荐题目
I spoke that slowly but I didn’t __________my meaning __________.
#77426
A
come…across
B
get…across
C
get…about
D
get…ahead
The stadium was named ____ the club’s first chairman , who had high fame .
#71367
A
in case of
B
in honor of
C
in search of
D
in place of
I have to draw some money from the bank before our money ________ .
#67899
A
runs out of
B
is run out
C
runs out
D
runs up