_______ is the strength of union that all the difficulties, if any, can be dealt with.
25. He is one of the old scientists who ______nothing about his personal income and fame .
24. —— How about camping, just for a change?—— OK, ______ you want.
23. In face of failure, it is the most important to keep up good state of mind.
22. —— Can I get the house cheaper?—— Sorry, it’s ______ my power to sell it any cheaper.
21. The village is far away from here indeed. It’s ______ walk.