In which of the following sentences is the underlined verb in the future perfect tense?
a. they will take the dog to the park with them.
b. by that time, he will have been gone for three days.
c. she really should begin to pack.
d. jean's daughter has begun to drive.

How does the map develop the central idea that scholars at jundi shapur spread the knowledge of sugar? the map illustrates the spread of sugar from new guinea to persia. the map shows that sugar was being refined primarily in the north rather than the south. the map illustrates the spread of knowledge about refined sugar processing to egypt. the map illustrates that people in china knew how to refine sugar and shared this knowledge. the answer is c