{"id":"hiset-free","timeLimitSec":420,"questions":[{"id":"hsf-01","section":"reading","q":"Read the passage.\n\n\"Every spring, the empty lot on Pine Street fills with tomato plants, beans and sunflowers. Neighbors who once only nodded to each other now trade seeds and recipes. Last year, they even held a harvest dinner on folding tables between the rows.\"\n\nWhat is the main idea of the passage?","options":["The empty lot on Pine Street is about to be sold to a builder","Sunflowers grow better than tomatoes in a city lot","The garden has brought the neighbors closer together","The neighbors held the harvest dinner because of bad weather"],"answer":2,"explain":"The passage moves from neighbors who 'only nodded' to neighbors who trade seeds and share a dinner. The other options are not stated."},{"id":"hsf-02","section":"writing","q":"Which version of the sentence is written correctly?","options":["My shift ends at six, so I can meet you at seven.","My shift ends at six so, I can meet you at seven.","My shift ends at six, I can meet you at seven.","My shift ends at six; so, I can meet you at seven!"],"answer":0,"explain":"Two complete sentences joined by 'so' need a comma before 'so'. A comma alone between them is a comma splice."},{"id":"hsf-03","section":"math","q":"A taxi charges $3.50 plus $2.25 per mile. A ride costs $21.50. How many miles was the ride?","options":["6 miles","8 miles","9.6 miles","10 miles"],"answer":1,"explain":"Subtract the fixed charge: 21.50 - 3.50 = 18.00. Then divide by the price per mile: 18 / 2.25 = 8 miles."},{"id":"hsf-04","section":"science","q":"Which of these is an example of a chemical change?","options":["Iron rusting in damp air","Ice melting into water","Sugar dissolving in hot tea","A glass bottle breaking into pieces"],"answer":0,"explain":"Rust is a new substance (iron oxide) formed when iron reacts with oxygen and water. Melting, dissolving and breaking change only the form or mixture, not the substance."},{"id":"hsf-05","section":"social","q":"Under the U.S. Constitution, which branch of government has the power to declare war?","options":["The President","The Supreme Court","The Secretary of Defense","Congress"],"answer":3,"explain":"Article I gives Congress, the legislative branch, the power to declare war. The President is commander in chief of the armed forces but cannot declare war."}]}