Read Text A in Unit 4 and identify the main parts that have been mentioned in it.

A. Nature of ADHD
B. Causes of ADHD
C. Advanced medical equipment used to treat ADHD
D. A new study or evidence to classify ADHD as genetic disorder
E. Significance of the new findings about ADHD
F. A new way to diagnose ADHD

Read Text C in Unit 4 and complete the following information about FSHD.(1) DefinitionFSHD is a disease that affects every single person who inherits the .(2) IncidenceFSHD affects about people.(3) SymptomsFSHD may cause in the , around the and in the —people who have the disease cannot smile.(4) Genetic probabilityFSHD is a genetic disease. If a parent has the that causes it, each child has a chance of getting it too. And anyone who inherits the gene is to get the disease.(5) CausesThe dead gene that stuck on the tip of chromosome 4 was repeated fewer than 10 copies got FSHD.

Read Text C in Unit 4 and identify the use of rhetorical devices in the following sentences.(1) Some of those genes, surprised geneticists reported Thursday, can rise from the dead like zombies, waking up to cause one of the most common forms of muscular dystrophy. (Para. 2)Identification: This sentence uses__________.(2) In this case, the dead genes had seemed permanently disabled. (Para. 5)Identification: This sentence employs __________.(3) About two decades ago, geneticists zeroed in on the region of the genome that seemed to be the culprit. (Para. 9)Identification: This sentence adopts __________.

Read Text C in Unit 4 and fill in the blanks with correct words in the description about how the ‘Junk’ DNA is activated and causes disease.Copies of a dead gene on the tip of (1) （chromosome 4 / chromosome 10）were repeated for (2) （more / fewer）than 10 times. The repeated but dead gene was not completely (3) (inactive / active) and it was transcribed. The transcriptions were (4) (correct / faulty), disintegrating at once.They were (5) (missing / forming) a crucial section, called a poly (A) sequence. When the dead gene had such a sequence, the dead gene was activated. But if people have more than 10 copies of such a dead gene, the chromosome’s structure may be changed, shutting off the region and protect people.