【推荐1】Doing outdoor ____________ (activity) can help students improve their abilities and skills. (所给词的适当形式填空)

【推荐2】No matter what you like to do,there is a way to get involved in various ________(activity) on Earth Day. (所给词的适当形式填空)

【推荐3】（2021全国乙卷）________ (activity) there range from whale watching to hiking (远足) and accommodations aim to have a low impact on the natural environment. （所给词的适当形式填空）

【推荐1】阅读下面材料，在空白处填入适当的内容或括号内单词的正确形式。
1. Everyone should work hard and do what they can ____________(fight) against national smog.
2. ____________(observe) the problem for many years, he announced that we are facing the severe environmental problem of our time.
3. We should produce more things from materials that have been recycled, and less from raw materials, the supply of ____________ is growing smaller and smaller.
4. He travelled on the plane like this, keeping the tortoise ____________ (hide) in a blanket.
5. I remember ____________ (invite) to their party, but I have forgotten the invitation in the office.
6. I told Hannah my secret and ____________ (admit) how badly I had done in the math quiz.
7. David has done good deeds all his life, ____________ (earn) him much reputation.
8. They started shouting at each other and it turned into a horrible ____________ (argue).
9. ____________ it may feel awkward, if she really is your best friend, you should apologize for blaming her.
10. We need to stop thinking of companies and businessmen ____________the enemy and give them more credit.

【推荐2】In ______(relieve) the girl took a deep breath. （所给词的适当形式填空）

【推荐3】I am a very _______ child, and sitting in the classroom and listening to the teacher was not enough for me because I have a lot of _______to release. (energy) (所给词的适当形式填空)

【推荐1】The task John set for himself was to remove harmful _________ (substance) from some sludge(污泥). (所给词的适当形式填空)

【推荐2】单句语法填空
1. Have you ever asked yourself why people often have trouble _______(learn) English?
2. One day my son asked me __________ there was a ham in a hamburger.
3. Neither is there pine ________ apple in pineapple.
4. Even the _________(small) of words can be _________(confuse).
5. English ________(invent) by people, not computer.
6. Why are shameless and shameful ________(behave) the same?
7. It reflects the ________(create) of the human race.
8. “Hard” is _______ opposite of “soft”.
9. When we look out of the window _______ see rain or snow, we can say “it’s raining” or “it’s snowing”.
10. In our free time we can paint a _________(paint).