Cuando se aplica has y cuando have en prente perfecto?

The phrase, "the longest journey begins with a single step" means

Which statement from chamberlain's speech to parliament did the least to support his cause? a. "no doubt i shall have plenty of critics who will say that i am guilty of facile optimism . ." b. "the house will remember that when i last addressed them i gave them some account of the godesberg memorandum . ." c. "therefore, it was essential that we should quickly reach a conclusion . ." d. "the relief that our escape from this great peril of war has, i think, everywhere been mingled in this country with a profound feeling of sympathy . ."

Hur ! asap what is the structure of the following sentence? although i have already visited africa, i would certainly like to return. a) compound b) compound-complex c) complex d) simple