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1、I prefer walking ____ climbing.A、on B、from C、of D、to
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2、The oceans are very important ____ both humans and animals.A、for B、in C、to D、of
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3、You should stop ____ water.A、waste B、be wasted C、wasted D、wasting
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4、Trees help us to keep the city ____.A、cleaning B、clean C、cleaned D、to clean
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5、A forest is ____ large area of trees.A、a B、an C、the D、/
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6、Forests provide shelter and food ____ animals and insects.A、to B、of C、with D、for
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7、People cut down trees ____ paper.A、make B、to make C、making D、made
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8、Many animals die ____ we cut down too many forests.A、so B、if C、when D、because
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9、We get ____ from plants.A、cotton B、skin C、wool D、sand
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10、Kitty always ____ lunch with Tom.A、share B、sharing C、shared D、shares
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11、Oceans are very important to ____ humans and animals.A、only B、both C、either D、also
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12、We should keep our city ____.A、to beautiful B、be beautiful C、beautiful D、being beautiful
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13、Children can keep healthy ____ too much meat.A、with not eating B、not by eating C、not with eating D、by not eating
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14、The desks in our classroom are ____ wood.A、make of B、made of C、make from D、made from
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15、— ____ does it feel?
— It's soft.
A、What B、Where C、When D、How -
16、Boys, ____ talk noisily here.A、won't B、can't C、don't D、mustn't
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17、Some students dislike housework, because they think it makes them (厌倦的).
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18、As we all know, smoking can (导致) to health problems.
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19、I felt lucky to be (活着的).
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20、The (孤单的) man lives by himself in a big house.