1) Water _____________ by us. a) can be conserved b) may wasted  c) can be given 2) Some plastics _______________ in recycling containers.  a) can put b) has to c) may be put 3) A faucet with a leak ______________. a) can repair b) must be repaired c) may be build 4) The plastic bags ______________.  a) may not be bought. b) must be deliver. c) can be reused. 5) The old magazines________________.  a) must to recycled. b) can be recycled. c) may be used. 6) Energy ________________for good things.  a) must be conserved. b) may be protected. c) have to be 7) Future cars ________________ to run with electricity.  a) can be build b) need to drive c) must be designed 8) Chemicals ________________to grow plants.  a) may be applied b) cannot be used c) must be added. 

Step 15- Passive with modals

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自動保存: を復元しますか?