Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Using eight eights and addition only, can you make 1000?

You see me once in June, twice in November, and not at all in May. What am I?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

What does this rebus mean?

O
N
C
E
TIME

What is the word or phrase below?
R | E | A | D

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?