1._____wedding of Prince William and Kate has______attention

1._____wedding of Prince William and Kate has______attention of
millions of people in the world.
A.A;/ B.The;/ C.A;the D.The;the
2.After sailing for five months ,they arrived at_______they thought was the place they had been looking for.
3.My sister met him at Wenzhou Grand Theatre yesterday afternoon,so he ______your lecture.
A.could't attend B.mustn't have attended C.should't attend D.could't have attened
4.an increasing number of people后面用单数还是复数?