7．(2015·全国卷Ⅱ)When a new day breaks, the walls have given up their heat and are now cold enough ________ (cool) the house during the hot day; at the same time, they warm up again for the night.

　　解析：to cool　"be＋形容词＋enough＋to do sth."为固定结构，意为"足够......，能够做某事"。

　　8．(2014·全国卷Ⅱ)I heard a passenger behind me shouting to the driver, but he refused ________ (stop) until we reached the next stop.

　　解析：to stop　refuse后接动词作宾语时，要用其不定式形式，即refuse to do sth."拒绝做某事"。

　　Ⅱ.单句改错

　　1．(2018·全国卷Ⅱ)As a kid, I loved to watch cartoons, but no matter how many times I asked to watching them, my parents would not let me.________________

　　解析：watching→watch　ask to do sth.意为"请求做某事"，是固定结构。

　　2．(2018·全国卷Ⅲ)Some of us were confident and eager take part in the class activity; others were nervous and anxious.________________

　　解析：take前加to　be eager to do sth.表示"渴望做某事"，是固定结构。

　　3．(2017·全国卷Ⅱ)When summer comes, they will invite their students pick the fresh vegetables！________________

　　解析：pick前加to　invite sb. to do sth.意为"邀请某人做某事"，是固定结构。

　　4．(2016·6月浙江高考)He would ask who we were and pretend not to knowing us.________________

　　解析：knowing→know　pretend后面接不定式作宾语，这里是否定式pretend not to do sth."假装不做某事"。故knowing改成know。

　　5．(2015·四川高考)It's been a month since I came to this new school and I really want share with you some of the problems I have been experiencing.________________

　　解析：want后加to　want后跟动词不定式作宾语，want to do sth.意为"想要做某事"。

　　6．(2015·浙江高考)The position of the classroom with its view made me felt like I was dreaming.________________

解析：felt→feel　make后面跟不带to的动词不定式作宾补，即make sb. do sth.，表