A.keeps | B.keep | C.kept |
A.protected; plant | B.protect; plants | C.protect; plant |
A.use; wash | B.using; washing | C.use; washed |
A.have to | B.needs to | C.mustn’t |
A.to use | B.using | C.use |
A.oceans | B.land | C.forests |
A.pick up | B.throwing | C.throw |
A.too many | B.too mush | C.lots |
A.in | B.on | C.for |
A.an | B.some | C.a |