【推荐1】Nowadays many children prefer________(surf) the Internet at home to taking exercise outdoors. (所给词的适当形式填空)

【推荐2】________ (surf) the Internet is definitely a big part of my life. （所给词的适当形式填空）

【推荐3】Wind ________ (surf) can be strenuous but immensely exciting.(所给词的适当形式填空）

【推荐1】The Institute spends a lot of time _____(think) hard about how ____(boost) American productivity. (所给词的适当形式填空)

【推荐2】If you’re tired of________________(wander) around the gym wasting time and becoming bored, you can attend an upbeat group fitness class that’ll keep your workout on track. （所给词的适当形式填空）

【推荐3】I remember ________ (put) my book on the table this morning. But I can’t find it anywhere. (所给词的适当形式填空)