Ⅰ.单句语法填空
1．They want to make it clear to the public that they do an important and necessary job.
2．Do remember to watch out for cars while crossing the street.
3．What makes me puzzled (puzzle) is why he left the country without telling anyone.
4．We live in a global (globe) village, but this doesn't mean that we all behave in the same way.
5．The biologist (biology) thinks that some plants in this area are in danger of extinction.
6．Most children need encouragement in the face of failure so that they can cheer up again.
7．We decided to cut down the tree in front of the window because it blocked out the sunlight.
8．It rained heavily in the south, causing (cause) serious floods in several provinces.
9．Hearing the exciting news, he was too excited to_say (say) a word.
10．The boy often breaks in while his parents are speaking.
