The cousins are alike in age，but ________ they are as different as day and night.

 the patient’s progress was encouraging as he could ______ get out of bed without help.

Twenty million years ago, Idoho was not the dry place as it is now. ______, it was warm and damp, covered with thick forests.

 He knows it's almost impossible to finish the ,task he but he wants to have a try ______.

Though having failed several times, Tim, who didn’t give up his dream, _____ made his dream come true.