1.(四川卷11)In many people’s opinion，that company，though relatively small，is pleasant        .
A. to deal with       B. dealing with      C. to be dealt with    D. dealt with
解析：考查不定式句型sb./sth. is adj./n. to do。该句型相当于to do sth. is  adj./n.。命题人在该句型中插入了though状语，有一定的干扰。此题实际是that company is pleasant to deal with= to deal with that company is pleasant。
2.(四川卷4) A great number of students          said they were forced to practise the piano.    
A. to question       B. to be questioned      C. questioned        D. questioning
解析：question与students存在被动关系，question表示的动作也已完成，故用过去分词。
3.(四川卷17). The lawyer listened with full attention，       to miss any point.
A. not trying        B. trying not        C. to try not          D. not to try
解析：句中listen和try not to miss为同时进行的动作，故用现在分词的一般式做伴随状语。又动词不定式的否定式要在其前加not.故选B。
4.(天津卷12). I rained heavily in the south, _______ serious flooding in several provinces.
A. caused             B. having caused     C. causing         D. to cause
解析：空格后serious flooding是rained heavily的后果，而且句子主语it和cause之间存在主动关系，所以此处要用动词的ing形式作结果状语。
句意：南方下了大雨，造成好几个省分的严重洪灾。
5.(重庆卷30). The news shocked the public,    to great concern about students’ safety at school.
A. having led  B. led               C. leading         D. to lead
解析：The news和lead之间是主动关系，并作shocked的伴随状语，所以用leading。
句意：这个消息使公众震惊，也引起了人们对学生在校安全的关注。
6.(重庆卷34). Many buildings in the city need repairing, but the one     first is the library.
A. repaired          B. being repaired      C. repairing        D. to be repaired
解析：the one指代前面提到的buildings与repair是动宾关系，由前半句房屋需要修缮可知修缮这个动作发生在need之后，所以用to be repaired.
7.(浙江卷20). The traffic rule says young children under the age of four and     __ less than 40 pounds must be in a child safety seat.
A. being weighed       B. to weigh              C. weighed    D. weighing
解析：根据句子结构：主语：the traffic rule；谓语动词：says；宾语从句：young children under the age of four and ____ less than 40 pounds must be in a child safety seat。
宾语从句中的主干为：young children must be in a child safety seat。under the age of four and ____ less than 40 pounds用于修饰宾语从句主语children。
动词weigh与名词children是主动关系，所以选择weighing。
句意：交通法则规定四岁以下并且体重不超过四十磅的婴儿必须坐在婴儿安全座上。
9.(上海卷32). I had great difficulty       the suitable food on the menu in that restaurant.
A. find            B. found              C. to find              D. finding
解析：have difficulty(in)doing sth.的结构：做某事有困难。
10.(上海卷33). Lucy has a great sense of  humour and always keeps her colleagues_______       with her stories.
A. amused         B. amusing           C. to amuse          D. to be amused
解析：过去分词作宾语补足语。与它所修饰的her colleagues存在被动关系。（be）amused with…
11.(上海卷35).      the city centre, we saw a stone statue of about 10 metres in height.
A. Approaching    B. Approached        C. To approach       D. To be approached
解析：现在分词作时间状语，此时分词的逻辑主语就是主句的主语。
12.(上海卷40). Thai is the only way we can imagine        the overuse of water in students' bathrooms.
A. reducing          B. to reduce     C. reduced   D. reduce
解析：此处应该用不定式the way to do sth表示做……的途径、方式。the only way to do……,we can imagine 做定语，前面省略了that.