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1 Betty has been on a diet (节食减肥) for a long time, but she looks a bit heavier,

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2 Keeping your laptop (便携式电脑)all the time will kill its battery (电池) faster.

3 Talking, dancing, playing a game--all of these activities allow you towith other people.

4 Much to my annoyance (生气), whenever Iher, she always comes up with an excuse.

5 While Facebook remains the most popular social site, its growth has gradually slowed down.