Meaning of Unknown Words

Today I had to deal with one mishap after another. I couldn’t find my car keys, I dropped a bowl of soup at lunchtime, and my computer crashed twice.
In this sentence "mishap" means...

• unlucky accident
• event
• unexpected question
• plan

I asked the instructor to explain a confusing passage in the textbook. She said, “I wish I could, but it’s obscure to me, too.” 
In this sentence "obscure" means

• obvious
• long
• unclear
• short

Teachers may overlook it when a student is two minutes late. But they are not going to condone someone’s walking into class a half hour late.
In this sentence "condone" means...

• allow
• color
• notice
• hear

Lakes occupy less than two percent of the Earth’s surface, yet they help sustain life For instance lakes give us fish to eat irrigate life. For instance, lakes give us fish to eat, irrigate crops, and generate electrical power. What does the word sustain probably mean?

• support

• destroy

• prolong

• obstruct

Use context clues to figure out what the word in red means:
Just then, they heard thunder rumble in the distance. Moments later, drops of rain fell on the car’s windshield. 

• roar
• speak
• think
• rain

The frigid water made Elizabeth’s teeth chatter.

• cold

• clean

• green

• warm

What type of context clues use similar words to help with the meaning of an unknown word?

• Antonyms
• Synonyms
• Examples
• HDefinitions

Comparing something opposite is using what type of clues?

• Antonyms
• Synonyms
• Examples
• Definitions

Telling what a word means within the sentence is an example of what type of context clue?

• Antonym
• Synonym
• Example
• Definition

Violence, whether it is hitting, kicking, or punching, is not tolerated at school.
This uses which type of context clue?

• Antonym
• Synonym
• Example
• Definition