Simple of past of 'be' verb

[mastrochili]

English Error, Elementary Level

ESL/EFL Test #16 "Where are my Glasses?", question 1

Mrs Jones was 88 and worried on every single thing.

(a) was
(b) on
(c) single thing

English Error, Elementary Level

ESL/EFL Test #16 "Where are my Glasses?", answer 1

Mrs Jones was 88 and worried about every single thing.

Correct entry: about
The error was: (b) on
_________________________

My sister was came yesterday to my birthday party.

[Mister Micawber]

.
No 'was':

My sister came yesterday to my birthday party.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber