【推荐1】These scientists ______(puzzle) about how to solve the problems these years. (所给词的适当形式填空）

【推荐2】The boy ________ his mother, so there was a ________ (puzzle) expression on her face. (所给词的适当形式填空）

【推荐3】Her ______(puzzle) look on her face suggested she didn’t understand what I said. (所给词的适当形式填空)

【推荐1】At the meeting yesterday,he raised a couple of________(effect) and practical suggestions. （用所给词的适当形式填空）

【推荐2】The________ (shock) news ________ (shock) all the people around, which was also ________shock to her father who was working abroad. （所给词的适当形式填空）

【推荐3】语法填空
1. School uniforms are ______(tradition) in Britain, but some schools are starting to get rid of them.
2. The obvious one is money; eating out once or twice a week may be ______(afford) but doing this most days adds up. There could be an even ______ (high) cost on your health.
3. Students should have a proper attitude towards college before thinking about which college to attend, and it’s never too early to make necessary preparations for a healthy and ________(meaning) college experience.
4. We are so proud of her. It’s ________(wonder).
5. They also shared with us many ____(tradition) stories about Hawaii that were ______(huge) popular with tourists.
6. Scientists have responded by noting (note) that hungry bears may be congregating(聚集) around human settlements, leading to the illusion(错觉) that populations are ______(high) than they actually are.
7. A taste for meat is ________ (actual) behind the change: An important part of its corn is used to feed chickens, pigs, and cattle.