III. Give the correct forms (V-ing or to-V) of the verbs given. (Giải thích) 1. A smartwatch can be used for ______ _______ (measure) your exercise efforts. 2. People use this electronic device ____ _____ (connect) with other people all over the world. 3. This mobile application is used for recording and ____ _____ (send) distress signals. 4. An e-book reader is convenient; it is used _____ _____ (read) electronic books, newspapers or magazines. 5. Despite the convenience of motorbikes, many people ride their bicycle or walk _____ ____ (keep) fit. 6. This machine is used for _______ ________ (massage) at home. 7. We can use a memory card ____ ______ (store) a lot of music or photos. 8. This robot is designed for _____ ______ (help) old people with certain household chores.