Can someone help me with a constition test? only 10 questions!?

hey guys, i really need help on a Constitution test! here asre the questions:

1.) Treason is
a. talking aganist the u.s.
b.not mentioned in constitiuon
c. refusing to vote
d. aiding the enemies of the y.s.

2.) State legislatures used to elect
a. senators
b. presidents
c. representatives
d. justicies

3.) The preamble to the constituiton
a. was added in 1791
b. tells why colonies declared independence
c. lists the greviances agnaist the english government
d. tells why constition was written

4.) Who has the power to admit new states
a. president
b. supreme court
c. congress
d. president pro tempore

5.) Who appoints justices to the supreme court?
s. president
b. senate
c. cheif justice
d. vice president

6.) A person actaully becomes president
s. when he or she takes the oath of office
b. on election day
c. when he or she is nominated
d. when the electoral calloge meets

7.) A person appointed bu the president to fill the vancant office of vice president must be confirmed by a majority vote
a. of the senate
b. of the supreme court
c. of the house of representatives
d. of both houses of congress

8.) Amendments can be proposed by
a. 2/3rds vote of both houses of congress
b. 2/3rds boted of state sentators
c. conventons of 1/2 of the states
d. legisalatures of 3/4ths of the states

9.) The legistlataive branch checks exceutive branch by
a. using the veto
b. reducing president's salary
c. decalring laws un constitiuonal
d. passing laws over a veto with a 2/3rds vote

10.) The exceutive branch checks(or controls) legisalaive branch by
a. vetoing bills
b. passing laws over veto
c. decalring laws uncostitional
d. controlling salaries

I would really apriecate ANY answers you may have. Thank you so much!

have a great day!

1 D?
2 A
3 D
4 C
5 A
6 A
7 C?
8 D
9 D
10 A

I'll answer the ones I'm sure of...
1. d
5. a
6. the first one, after taking oath
9. d
10. a