Education in the United States and Canada is divided into the following levels at the indicated Primary Education Elementary School ages 6-12 Secondary education Junior High School ages 12-14 High School ges14-18 Post Secondary education Junior College ages 18-20 (MA)22-24 Graduate school ages (PH. D )22-26/8 Post graduate fter Ph.d 2. Grading Systems in the U. s Most colleges use letter grades like A, B, C, D, F, and some use plus or minus like B-or C+. To compute students'averages they say A=4, B=3, C-2, D=1, F=0. It takes an average of 2.0 to graduate. Grades of F must be repeated to get credit Most students take 5 or occasionally 6 courses per semester, and most courses are 3 credits. It usually takes between 120 and 130 credits to graduate A few colleges use numerical grades instead of letters. If so, most likely A=90, B=80, C=70, D=60, but this may be up to the professor ■ Notes to the text In less than two weeks, I'll have graduated.(Para 1) I'lI have graduated within two week. 不到两周,我就要毕业了 This is an example of the use of the future perfect tense. The future perfect tense tells us something that will be past at or before a certain time in the future7 Education in the United States and Canada is divided into the following levels at the indicated ages. Primary Education: Pre-school ages 2 - 6 Elementary School ages 6 - 12 Secondary Education: Junior High School ages 12 - 14 High School ages 14 - 18 Post Secondary Education: Junior College ages 18 - 20 4 Year College ages 18 - 22 Graduate School ages (MA) 22 - 24 Graduate School ages (PH.D.) 22 - 26/8 Post Graduate after PH.D. 2. Grading Systems in the U. S. Most colleges use letter grades like A, B, C, D, F, and some use plus or minus like B- or C+. To compute students’ averages they say A=4, B=3, C=2, D=1, F=0. It takes an average of 2.0 to graduate. Grades of F must be repeated to get credit. Most students take 5 or occasionally 6 courses per semester, and most courses are 3 credits. It usually takes between 120 and 130 credits to graduate. A few colleges use numerical grades instead of letters. If so, most likely A=90,B=80, C=70, D=60, but this may be up to the professor. ◼ Notes to the Text 1. In less than two weeks, I’ll have graduated. (Para 1) I’ll have graduated within two weeks. 不到两周，我就要毕业了。 This is an example of the use of the future perfect tense. The future perfect tense tells us something that will be past at or before a certain time in the future