difference between "probably" and "possibly"

[Churu]

I have some multiple choice questions want to ask you to explain it to me
1.Let's the doctor [check/examine] your pain.
2.I's raining .Now I wish I [brought/had brought] my umbrella.
3.The company owes................
A.20$ to the government
B.the government 2o$
4.Your father told me that you were going ,[didn't he/weren't you]

Which one is correct? Why?
And somebody tells me the difference between "probably and possibly"

thanks .I need it as quick as possilbe

[Mister Micawber]

.
Please show us your own choices first-- and check your typing!
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber

[Churu]

yeah I think
1.examine
2.owe 20$to the government
3.Brought
4.weren't you

[Mister Micawber]

.
1.Let's the doctor [check/examine] your pain.-- There is a problem with this sentence: doctor's neither check nor examine 'pain'. So I can't choose an answer

2.I's raining. Now I wish I [brought/had brought] my umbrella.-- You answered 'owe 20$to the government'. That is wrong. The answer is 'had brought'.

3.The company owes................ .
A.20$ to the government
B.the government 2o$
-- You answered 'brought'. That is wrong. Neither A nor B are right; they should read '$20'. If that is changed, then both A and B are right.

4.Your father told me that you were going, [didn't he/weren't you] -- You answered wrong again. The correct tag is 'didn't he', reflecting the main verb.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mister Micawber