在探究“凸透镜成像规律”的实验中，依次将点燃的蜡烛、凸透镜、光屏放在同一直线上的A、O、B位置，在光屏上得到清晰的烛焰的像，如图所示，①将凸透镜向____移动，可以使烛焰的像清晰地成在光屏的中央．②此时所成的像是倒立、____的实像．③调节烛焰、凸透镜、光屏的中心在同一高度上，将蜡烛向凸透镜方向移动一段距离，调整光屏位置得到一个清晰的像，这个像与原来相比____ （填“变大”、“变小”或“不变”）

用方框中所给单词的适当形式填空，使对话通顺、正确。每词仅用一次（每空一词）。

A: Annie, I'm a little nervous. I have to finish ____ a book and give a report next Monday.

B: That doesn't sound too bad.

A: But I'm a very slow reader.

B: Just read quickly to get the main ideas at first. Don't read word ____ word. Read word groups.

A: But I don't understand many of the words. I have to use a dictionary.

B: Try to guess a word's ____ by reading the sentences before and after it. You ____ understand more than you think.

A: That sounds difficult!

B: Well, be patient. It takes time. You can become better by reading something you enjoy every day. The more you read, the ____ you'll be.

We can't go out for a walk _______ the bad weather.

—Sounds good．