17It’s said ______ ______ was everything _______ MrProfessor could tell us

Maria, are those____ knives—No, ____ knives are here.

ry woman though she is, she had wonthe award because she tries every means to make people _________ of theimportance of the environment conservation

_____ of rain in the process ofplanting trees, you must stop.

________with so much trouble，we failed to completethe task on time.