1. I'll be in middle school this summer.2. I'll be in junior high school this summer.3. I will be in the ninth grade this year.4. I will be a ninth grader this year.
 middle school junior high school國中三年級 = 美國的九年級我今年上國三 = I will be in the ninth grade this year = I will be a ninth grader this year國三國中生 = ninth grader國中 = junior high school = middle school我今年夏天上國中 = I'll be in middle school this summer = I'll be in junior high school this summer
這是一個連環問題: 燃燒石油導致二氧化碳增加，二氧化碳增加導致溫室效應，溫室效應導致冰層融化、海平面上升。 (請填空)
This is a chain of problems. Burning oil leads to increase in carbon dioxide, which leads to the greenouse effect, which leads to melting of glaciers, which leads to rising sea levels.