Complete the following sentences by choosing the best option

The sentence is "The government has banned the dumping of chemical ______ into water bodies."

• A. spill refers to an accidental release.
• B. waste refers to unwanted material.
• C. wastage is the act of wasting.
• D. garbage refers to household refuse. The most appropriate word for unwanted chemical material that is dumped is waste. The correct option is B.

$$\boxed{\text{B. waste}}$$

The sentence is "Buses were ______ across the river in boats."

• A. ferried means to transport across water, especially by boat.
• B. driven implies movement on land.
• C. flown implies transport by air.
• D. launched implies setting something afloat. The correct term for transporting something across a river in boats is ferried. The correct option is A.

$$\boxed{\text{A. ferried}}$$

The sentence is "More schools are investing in digital ______ to improve teaching delivery."

• A. tools are general instruments or devices.
• B. mechanisms are systems of parts working together.
• C. apparatus refers to equipment for a specific purpose.
• D. appliances are typically household machines. Tools is the most fitting general term for digital resources used in teaching. The correct option is A.

$$\boxed{\text{A. tools}}$$

The sentence is "The bodies of the accident victims were ______ beyond recognition."

• A. scattered means spread over an area.
• B. soiled means made dirty.
• C. destroyed means ruined.
• D. mangled means severely disfigured or damaged. Mangled best describes bodies that are severely damaged in an accident to the point of being unrecognizable. The correct option is D.

$$\boxed{\text{D. mangled}}$$

The sentence is "The ______ between the rich and the poor is still too wide."

• A. space is a general area.
• B. gap is a break or difference, commonly used for economic disparity.
• C. gulf is a wide difference, often in opinion.
• D. tunnel is an underground passage. "The gap between the rich and the poor" is a common idiom to describe economic disparity. The correct option is B.

$$\boxed{\text{B. gap}}$$

The sentence is "Amy's hairstyle is ______ it has remained constant over the years."

• A. invariable means never changing or always the same.
• B. unchangeable means not able to be changed.
• C. unalterable means not able to be altered.
• D. immutable means unchanging over time or unable to be changed. Since the hairstyle "has remained constant over the years," invariable is the most direct fit, emphasizing its lack of variation. The correct option is A.

$$\boxed{\text{A. invariable}}$$

The sentence is "The president has just signed the ______ into law."

• A. bill is a proposed law.
• B. decree is an official order.
• C. motion is a formal proposal.
• D. rule is a regulation. A bill is what is signed by a president to become a law. The correct option is A.

$$\boxed{\text{A. bill}}$$