subject verb agreement

1.  The piano as well as the pipe organ ____________ to be tuned for the big concert.
HAS
HAVE
2.  The mayor together with his two brothers ____________ going to be indicted for accepting bribes.
ARE
IS
3.  Neither of my two suitcases ____________ adequate for this trip.
IS
ARE
4.  There ____________ a list of committee members on the head-table.
ARE
IS
5.  Everybody in the class ____________ done the homework well in advance.
HAS
HAVE
6.  The jury ____________ their seats in the courtroom.
TAKE
TAKES
7.  Neither the teacher nor the students ____________ to understand this assignment.
SEEM
SEEMS
8.  ____________ either my father or my brothers made a down-payment on the house?
HAS
HAVE
9.  Hartford is one of those cities that ____________ working hard to reclaim a riverfront.
HINT: Try starting the sentence with "Of those cities that . . . ."
IS
ARE
10.  Some of the grain ____________ gone bad.
HAVE
HAS
11.  John or his brother ____________ going to be responsible for this.
ARE
IS
12.  A few of the students ____________ doing so well they can skip the next course.
ARE
IS
13.  Either the Committee on Course Design or the Committee on College Operations ____________ these matters.
DECIDE
DECIDES
14.  One of my instructors ____________ written a letter of recommendation for me.
HAVE
HAS