We must thank trees ____ oxygen into the air .

题型：单选题题类：常考题难易度：困难

牛津深圳版英语七年级下册Unit 4 Colourful life 单元测试

We must thank trees ____ oxygen into the air.

A、produce B、to produce C、for produce D、for producing

举一反三

There we {#blank#}1{#/blank#} {#blank#}2{#/blank#} our tents and {#blank#}3{#/blank#} {#blank#}4{#/blank#} {#blank#}5{#/blank#}.

I like {#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} {#blank#}5{#/blank#}.

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