1 . There is much to learn ,share and celebrate on World Olive Tree Day, and UNESCO encourages everyone to participate in activities such as debates and exhibitions__________ (organize) worldwide. (所给词的适当形式填空)

2 . A team of scientists __________ (lead) by Professor Eli Shlizerman at the University of Washington has found that the monarch is able to tell the time of day and to measure the position of the sun by using its eyes, so that the monarch manages to reach the places where it will spend the winter. (所给词的适当形式填空)

3 . 单句改错，每个句子中有且只有一个错误
1. People don’t have enough exercise are more likely to have heart attacks.
2. As is known to all, 70% of the air you breathe in every day are nitrogen (氮气).
3. With the help of the teachers, most of the students have made great progresses.
4. Though knew the truth, the witness of the case remained silent for some reason.
5. My grandma used to tell me that a losing opportunity never returns.
6. Can you help Jane out? She can’t make herself understand in class.
7. When it comes to find excuses, she is an expert with whom no one can compare.
8. Xi’an, known as Chang’an then, has become the world’s largest city by the Tang Dynasty.
9. Unfortunate, the car accident claimed two lives and left four injured.
10. Riders are often scared for the first time they get on a horse.

4 . With Marshall________(admit) into Harvard University, his parents are filled with joy and have been planning a family trip to the US. （所给词的适当形式填空）

5 . Paul is f________ up with pop stars talking to president and having their photos on the front page, believing that they just want to help their careers. (根据首字母单词拼写)

6 . ________ (bury) in Texas, US, Charles Coghlan’s coffin flowed northeast and was found near his hometown in Canada eight years later. (所给词的适当形式填空）