The reason__________ their failure you know is__________ they didn't get fully prepared for the experiment．

------The two pairs of shoes are __________ the same colour．

------But they are different __________ colour．

Only __________ one loses freedom __________know its value．

------Sleep well last night?

------Far from that! My next-door neighbor      music pretty loud.

With the boy______ the way, we had no diffaculty ______the village.

______________ with the sun, the earth is not big at all.

 The little boy is dirty from head to foot because he ___ in the mud all morning.        

 Her ________ look suggested that she was very _______ with the answer.

This book is well worth _______. Would you like to buy one?

I have bought two ball pens , _______ writes well.