Verb or Noun?

Humans love ​ (a)   themselves with puzzles.

• challenging
• challenge

Tags

CCSS.L.3.1A

CCSS.L.3.1D

It took Professor Rubik over month to ​ (a)   his own problem.

• solve
• solution

Tags

CCSS.L.3.1A

CCSS.L.3.1D

Some scientists also think puzzles and games can (a)   memory.

• improve
• improvement

Tags

CCSS.L.1.1E

CCSS.L.3.1A

CCSS.L.K.1B

There are many methods to ​ (a)   new English words.

• memorize
• memory

Tags

CCSS.L.3.1C

I hate ​ (a)   out loud in the classroom.

• answering
• answer

Tags

CCSS.L.8.1A

What kind of​ ​ (a)   is important in life?

• achievement
• achieve

Tags

CCSS.L.3.1C

Do you think parents have too much ​ (a)   ?

• expectation
• expect

Tags

CCSS.L.3.1C

The examiner​ (a)   out the rules.

• pointed
• point

Tags

CCSS.L.2.1D

CCSS.L.3.1D

CCSS.L.3.1E

CCSS.L.4.1B

CCSS.L.5.1.B-D

Obviously there was a bad​ (a)   with the grammar.

• understanding
• understand

Tags

CCSS.L.8.1A

She didn´t like the ​ (a)   of the new books.

• production
• produce

Tags

CCSS.L.3.1C