6. Today, a lot of people use acupuncture as a _______alternative to modern medicine. A. precautious B. reliable C. steady D. painful 7. Being the eldest child in the family, Yen ______ a large share of housework such as cleaning the house, taking out the garbage and doing the laundry. A. looks for B. gets over C. turns up D. takes up 8. The Japanese invented instant noodles and _________. A. paper B. gun powder C. video games D. smartphones 9. A portable solar charger can be used to ________ mobile devices. A. store data B. charge C. take pictures D. transport files 10. A 3-D printer ________ producing solid objects similar to the originals. A. is used to B. used to C. is used for D. uses