.Without any doubt, depression________can create a variety of negative health effect.

---You shouldn't have said that．Look! She is getting _____． --- But I meant no harm．

It is        to read the books our teacher recommended , for they are well _____ reading.

 Interest is as ________ to learning as the ability to understand, even more so.

 The performance of this reasonably priced digital camera is _____ in quality to that of more expensive ones.