【推荐1】Space __________ (explore) provides a symbol of national pride. （所给词的适当形式填空）

【推荐3】Their team will undertake ________ (explore) for oil. （所给词的适当形式填空）

【推荐1】A group of scientists are going to take advantage of this tour ________ (explore) the unknown region. （所给词的适当形式填空）

【推荐2】The United Kingdom has a long and interesting history ________ (explore). （所给词的适当形式填空）

【推荐1】The________ (express) on her face showed that she was angry. (所给词的适当形式填空）

【推荐2】The ______(announce) was heard by millions of radio listeners this morning. (所给词的适当形式填空)

【推荐3】There’s a lot of ______(compete) between computer companies.（所给词的适当形式填空）

【推荐1】I would oppose _________(change)the law. (所给词的适当形式填空)

【推荐2】I know it’s time I got down to doing my homework, but I just can’t resist ________ (play) computer games. (所给词的适当形式填空）

【推荐3】By ________ (track) people’s e-mails and online posts, scientists have found that good news can spread faster and farther than disasters and sob stories. （所给词的适当形式填空）