【推荐1】Our new English book is 180 yuan. I don’t think it’s c_______ Instead, it’s expensive.

【推荐2】I would like to buy a __________ (便宜的) pen.

【推荐3】This coat is a little expensive, do you have a ____________(cheap) one?

【推荐1】根据句意及汉语提示，完成下面句子。
1. The students can express ______（他们自己）in English after four years' study.
2. Our teacher often tells us not to talk to ______（陌生人）in the street.
3. Yesterday Allen came here ______（独自）and left without saying anything.
4. Because there was no wind, the sea looked much ______（安静）than before
5. I will go there tomorrow ______（除非）it rains.

【推荐2】It’s __________ (hot) today than yesterday.

【推荐3】China is developing rapidly and it’s ______ and more powerful than ever before. (wealth)