This protects your clothes from food or is used to wipe your hands or mouth when necessary

This protects your clothes from food or is used to wipe your hands or mouth when necessary to start with,put the napkin on your lap.this protects your clothesTo start with,put the napkin on your lap.this protects your clothes from food or is used to wipe your hands or mouth when necessary..Hold the knife in your right hand and the fork in Is this your pen?--( ).---Is this your pen?A.pardon B your pardon c I beg Everyone should make a contribution to ___ the environment A protecting B protects C protection ls this ruler_?A:yours B:you C:your Is this doll（ A.yours B.your C.you this sentence in your paper is wrong,please c---- it Is this your c---- g-----?Yes,it is.thank you. this your glass?No,it is not______glassA:my B:your C:herIs this your glass?No,it is not______glassA:my B:your C:her what can I do ____ the environment?A.protect B.protects C.protecting D.to protect 为什么选择不定 We should help _____animals.Ato protect.BprotecWe should help _____animals.Ato protect.Bprotecting.C protect to.D protects people have found new ways ___ our environment .A.to protecting B.protect C.to protect D.protects . If we all think carefully,we can help___trees.A.protect B.protects C.protecting D.to protecting The wall_____the garden from the north windA.prevents B.protects C.shelters D.guards应该选什么呢? Mr.Li is writing a book on( )trees.A.to protect B.protecting C.protects D.protected 要说明理由 is this your friend?yes,()is .A.this B.tis this your friend?yes,()is .A.this B.that C.it D.he is this your book?yes,() A.this is B.it isis this your book?yes,()A.this is B.it is C.it isn't ______ your suitcase?A.Is this B.Are these C.Are this