3.3 Unit 3 Discovering Useful Structures Grammar语法省略-高一英语同步精品课件+课后习题（人教版2019必修第三册)

Unit 3 语法省略 一、单项选择 1．When ________ different cultures, we often pay attention only to the differences without noticing the many similarities. A．compare B．compared C．comparing D．having compared 2．Engineers noticed that the pipes were not expanding ________. A．as were expected B．as it was expected C．as expecting D．as expected 3．She had said little so far, responding only when_________. A．speaking B．spoken to C．spoken D．speaking to 4．Generally speaking, ______ according to the directions, the drug has no side effect. A．When taking B．when to taken C．when to take D．when taken 5．Man may disappear________ other creatures who became too specialized to survive their environment. A．as B．just as C．as if D．as have 6．If ________, I will sign up to take the training class tomorrow. A．necessary B．is necessary C．it necessary D．to necessary 7．In the lecture, little Jack kept silent all the time unless _________ to express his opinion. A．he invited B．invited C．he is invited D．being invited 8．When _____