(For me, music is a great source of enjoyment. Is that well the source of all the cases of infection Collocati at source energy /food/light sources CF: source, origin root 这些名词均有“起源,起因,根源”之意。 source指某事或者某物的来源出处,但更多指抽象事物的根源或来源。 origIn强调指事物的起源或由来,也指人的出身 root通常指问题产生的原因或根源。 Directions: ) Fill in the blanks with the three words above. Change the form where necessary. 1. Allergies(过敏症) are at the of a lot of health problems (= root) 2. At the conference, the scientist put forward a new theory to explain the of the universe. (= origins 3. Two thirds of the pupils are of Asian (origin) 4. We've found the of the trouble. source) 21.(Para. 12)make excuses: give a reason to explain careless ol offensive behavio You're always making excuses for not helping me. 他总为迟到找借口。 ( He's always making excuses for being late 22. (Para. 12 grab 1)take hold of sb. or sth. with a sudden or violent movement A young man grabbed her handbag as she was walking across the 2 take an opportunity, accept an invitation, etc. immediately (插入声音文件grab ( l think you should grab your chance to travel while you're young a)quickly and suddenly put out your hand to try and catch or get sth He grabbed at the boy, but could not save him from falling. I grabbed at the glass just before it fell.9 (=For me, music is a great source of enjoyment.) Is that well the source of all the cases of infection? Collocations: at source energy / food / light sources CF: source, origin & root 这些名词均有“起源，起因，根源”之意。 source 指某事或者某物的来源出处，但更多指抽象事物的根源或来源。 origin 强调指事物的起源或由来，也指人的出身。 root 通常指问题产生的原因或根源。 (Directions:) Fill in the blanks with the three words above. Change the form where necessary. 1. Allergies (过敏症) are at the ________ of a lot of health problems. （= root） 2. At the conference, the scientist put forward a new theory to explain the _____ of the universe.（= origins） 3. Two thirds of the pupils are of Asian ________. (=origin) 4. We’ve found the ________ of the trouble. (=source) 21. (Para. 12 ) make excuses: give a reason to explain careless or offensive behaviour You’re always making excuses for not helping me. 他总为迟到找借口。 (=He’s always making excuses for being late.) 22.(Para. 12) grab v. 1) take hold of sb. or sth. with a sudden or violent movement A young man grabbed her handbag as she was walking across the park. 2) take an opportunity, accept an invitation, etc. immediately (插入声音文件 grab) (=I think you should grab your chance to travel while you’re young.) a) quickly and suddenly put out your hand to try and catch or get sth. He grabbed at the boy, but could not save him from falling. I grabbed at the glass just before it fell