since
(The correct phrase is "since 2012" because it refers to a time starting from that year.)

traveled
("I traveled" is the correct past tense verb to match the past action.)

districts
("Districts" makes sense here, as the writer is describing different areas or regions visited.)

landmarks
(Landmarks refers to famous, notable places or sights in a location, which fits the context of traveling.)

interesting
(The Tower of London is described as an interesting and historically rich sight.)

landmarks
(The word "landmarks" again fits because it refers to notable sites, like the Houses of Parliament and Big Ben.)

Although
("Although" introduces a contrast between seeing a glimpse of London and not seeing everything.)

made
("Made" fits because it is the correct past tense of "make" in this context.)

make
(This fits because cartoons are drawn and made into films.)

of
(The phrase "the use of" fits the context of describing how something is done in cartoons.)

new ideas
(This makes sense, as new ideas and advanced computer programs are being used in animation.)

end
(The word "end" fits as it describes a time, such as the end of the 1970s.)

share
(This makes sense because both adults and children share the enjoyment of the films.)

every
("Every" fits because it talks about the general reception of cartoon films, which includes many instances.)

fearful
(Cartoon films can be too scary or inappropriate for some audiences.)

mistake
(A mistake was made in trying to target the wrong age group, so the word "mistake" fits here.)

C. invited
(Being invited is the appropriate term when you are asked to go somewhere, especially to a dinner.)

B. wine
(A bottle of wine is a common gift to bring when you visit someone’s home.)

C. drinking
(Drinking a beverage like wine is a common option if you know the host’s preference.)

A. expected
("Expected" is the correct verb here, indicating what is customary.)

B. much
("Much" is used when referring to time in this context – "much late" would imply a significant amount of time.)

B. right
("Right" is used to refer to the correct utensil or way of doing something at the dinner table.)

D. what
("What" is used when asking for guidance on actions, like what to do next.)

B. forward
("Forward" is used in the phrase "looking forward to," meaning to anticipate something positively.)

C. the meal
(You thank the hosts for preparing the meal, which is the most relevant thing to thank them for.)

A. thank-you
("Thank-you note" is the proper term for expressing gratitude after a visit.)