一、请你用所给词的适当形式完成下列句子。
1. Here are some things they have learned from ______(scientist ) studies.
2. Sunglasses are used for _____ (keep) out the sun.
3. The students are ______ (confuse) about the ______ (confuse) problem.
4. I’m considering _____ (study) in Beijing or Shanghai.
5. I felt _______(embarrass) when everyone looked at me.
