【题目】Do not let any failures discourage you, for you can never tell ________ close you may be to victory.

【题目】 His writing is so confusing that it’s hard to make out _______ it is that he’s trying to express.

【题目】One can always manage to do more things, no matter______ full one’s schedule is in life.

【题目】--I'm sorry I made a mistake!

【题目】It remains to be seen the newly formed committee’s policy can be put into practice.

【题目】Science___________ many changes in our lives.

【题目】 I want to tell you is the deep love and respect I have for my parents.

【题目】The manager should take_______ action if safety standards are not being met.

【题目】When I opened the door, I found the ground _________ by fallen leaves.

【题目】Secretaries whose jobs mainly involve writing, ________ phone calls and receiving visitors usually work in offices.