帮我完成下面的完形填空,如果可以的话请解释

帮我完成下面的完形填空,如果可以的话请解释
Cloze：
A:Hey,Jeff,remember a month ago you asked to 11) __ early so you could go to your family reunion?
B:And I had a great time.Thank you very much.
A:Well,I'm glad to hear it because now I 12) have to put you in charge of the office for the rest of the day,because I'm 13) to my own family reunion today.
B:Hey,that sounds great to me.I've always wanted to be 14) ,hey,go have a blast!
A:OK,thanks a lot.
B:What do you do at your family reunion?
A:Well,you know,we have kind of a quiet get-together at my,my grandmother's home.My grandmother is 94,she's still 15) _,and,uh,you know,her..,my grandfather died about,oh,10 or 15 years ago.And uh,and so,we get together,and have 16) a quiet time together with,you know,her kids,and then my cousins are all together there,and,and we just usually have a pleasant meal,maybe we'll visit 17) ,because again,she's very 18) now,and we don't like to get things too excited.
B:Right.Are there many people there?
A:Oh,there will be maybe 10 or 15 people,and we do it 19) frequently now,that she's this old,so we do it every,oh,maybe3 or4 months,so...
B:Oh,that's really nice.
A:Yes,it's quite...It's very pleasant.
B:Well,have a good time,and I'll be glad to 20) ____.
A:Thanks a lot.
选项：
11.
A.knock at
B.knock in
C.knock off
D.knock out
12.
A.gonna
B.am gonna
C.gotta
D.am gotta
13.
A.in
B.on
C.out
D.off
14.
A.at charge
B.in charge
C.of charge
D.for charge
15.
A.alive
B.living
C.lively
D.live D.live
16.
A.little
B.few
C.many
D.kind of
17.
A.silently
B.still
C.quietly
D.calmly
18.
A.elderly
B.senior
C.retired
D.aged
19.
A.much
B.fairly
C.seldom
D.rarely
20.
A.take in
B.take on
C.take over
D.take up