Ⅰ.句型转换
1．She was on the point of leaving when I arrived.
→She
when I arrived.
答案：was about to leave
2．There was no bus, so we had to walk home.
→There , we had to walk home.
答案：being no bus
Ⅱ.单项填空
1．We were________giving up________they came to help us out.
A．at the point of; while B．on the point of; when
C．on the point of; while
D．about to; when
解析：选B。句意：我们正要放弃，这时他们来帮助我们脱离困境。be on the point of doing sth.when ...意为“正要做某事，这时……”，故选B。be about to后接动词原形。
2．He entered the room, ________.
A．his nose was red with cold
B．and his nose red with cold
C．his nose red with cold
D．his nose been red with cold
解析：选C。句意：他走进房间，鼻子冻得通红。独立主格结构his nose red with cold在句中作伴随状语。A项缺少连词；B项缺少谓语；D项中been应用being。
3．The children went home from the grammar school, their lessons ________ for the day.
A．finishing
B．finished
C．had finished
D．were finished
解析：选B。考查名词的独立主格结构。名词短语their lessons和动词finish之间是被动完成关系，故用过去分词finished。
4．She had just finished her homework ________ her mother asked her to practise playing the piano yesterday.
A．when
B．while
C．after
D．since
解析：选A。考查连词。句意：昨天她刚刚做完作业，这时她妈妈就让她练习弹钢琴。when在本句中作并列连词，意为：and at that time。while作并列连词，表示对比转折，意为“而”；after为从属连词或介词，意为：“在……之后”；since“自从……时候；既然……”。