Complete the sentences with the given words in their suitable forms. (共8分)
小题1:Some parents purchase new _______________ (toy) for their kids before Christmas.
小题2:All the classmates took the difficult exam, but only _______________ (fifth) of them passed.
小题3:They were proud to say these paintings belonged to _______________ (they).
小题4:The professor made an interesting _______________(speak) at the meeting.
小题5:Children were fond of reading _______________ (excite) stories in their free time. e
小题6:They had a(n) _______________ (happy) trip because of the bad weather.
小题7:PM2.5 is _______________ (main) caused by air pollution in some parts of the country.
小题8:The doctor is ready to _______________ (operation) on his broken leg.
小题1:toys
小题2:five
小题3:themselves
小题4:speech
小题5:exciting
小题6:unhappy
小题7:mainly
小题8:operate
试题解析:
小题1:考查名词。句意：有些家长们在圣诞节前给他们的孩子买新玩具。toy玩具，应用复数，故答案填toys.
小题2:考查数词。句意：所有同学参加难度大的考试，但他们只有五位考过了。fifth第五，基数词+of them他们中的几个人，故答案填five.
小题3:考查代词。句意：他们自豪地说这些油画属于他们的。they他们，belong to属于，根据语境可知是属于他们自己的，故答案填themselves..
小题4:考查名词。句意：教授在会上做了一个有趣的演讲。speak讲话，动词，其名词形式为speech。make speech演讲，故答案填speech.
小题5:考查形容词。句意：孩子们在空闲时间喜欢读令人兴奋的故事。be fond of 喜欢，excite令人兴奋，其形容词形式为exciting（修饰物）和excited（修饰名），story故事，故答案填exciting.
小题6:考查反义词。句意：由于恶劣的天气，他们的旅行不开心。happy开心的，其反义词为unhappy不开心的；根据语境可知恶劣的天气影响了旅行，会不开心，故答案填unhappy.
小题7:考查副词。句意：PM2.5主要是由国内某些地区的空气污染造成的。main主要的，形容词，其副词形式为mainly,副词修饰动词caused产生，故答案填mainly..
小题8:考查。句意：医生准备对他的坏腿进行手术。operation手术，其动词形式为operate,be ready to do
准备做某事，故答案填operate.