【推荐1】This will remind you of what you are working for and keep you ________ (focus). (所给词的适当形式填空)

【推荐2】Rather than _______________ (discuss) all of these questions at length, we prefer _______________ (focus) on the impact of the heavy snow. (所给词的适当形式填空)

【推荐3】________(focus) his attention on urgent problems, he hardly has time to play games with you. (所给词的适当形式填空）

【推荐1】The Internet has also made our lives unbelievably convenient, with all sorts of goods and services ________ (provide) by electronic commerce, more commonly known as e­commerce. (所给词的适当形式填空)

【推荐2】We have seen solar energy and renewable or reusable waste__________ (use) again to reduce the release of carbon dioxide. （所给词的适当形式填空）

【推荐3】With the work ______ (finish), he felt relaxed and began to listen to music. （所给词的适当形式填空）