A survey was carried out on the death rate of new-horn babies in that region, （） were surprising.

单项选择题Frequently single-parent children （） some of the functions that the absent adult in the house would have served.

A. take off
B. take after
C. take in
D. take on

单项选择题（） does business with that fellow is bound to lose money.

A. Whoever
B. Who
C. No matter who
D. However