Which sentences are compound-complex sentences? Check all that apply.Your brain produces more dopamine when it is engaged in solving a puzzle.Our brains produce a chemical known as dopamine that is involved in learning and in creating memories.We can put together a puzzle that has challenging shapes, or we can try to solve the sudoku in the newspaper.Working on puzzles increases our concentration and can expand our creativity; puzzle-making even has health benefits.Students can improve their performance when they are faced with a challenging task, but they will have to start doing jigsaw puzzles.
Answer
A
Your brain produces more dopamine when it is engaged in solving a puzzle.
B
Our brains produce a chemical known as dopamine that is involved in learning and in creating memories.
C
We can put together a puzzle that has challenging shapes, or we can try to solve the sudoku in the newspaper.
D
Working on puzzles increases our concentration and can expand our creativity; puzzle-making even has health benefits.
E
Students can improve their performance when they are faced with a challenging task, but they will have to start doing jigsaw puzzles.
Explanation
A compound-complex sentence has at least two independent clauses and at least one dependent clause. In C, “We can put together a puzzle” and “we can try to solve the sudoku” are independent clauses, while “that has challenging shapes” is dependent. In E, “Students can improve their performance” and “they will have to start doing jigsaw puzzles” are independent clauses, and “when they are faced with a challenging task” is dependent.
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