18．The research is so designed that once nothing can be done to change it．( )A．beginsB．having——青夏教育精英家教网——

18．The research is so designed that once ______ nothing can be done to change it．（　　）

17．______ with a difficult situation，he decided to ask his parents for some advice．（　　）

16．The local government has already collected three million dollars，_______ for the environment improvement．（　　）

15．The boys reached an island separated from the outside world，____they believed lots of treasure was hidden somewhere．（　　）

14．Had he not come an hour earlier，he___the secret that his mother was always there．（　　）

	A．	must never find		B．	must never have found
	C．	would never find		D．	would never have found

13．Others'ill will interests rather than disturbs me．I am only curious to know__it is in me that is annoying to them．（　　）

12．-What about the services in the hotel？
-They are at least as good as，if not superior to， in yours．（　　）

11．The movie is adapted from a novel，____ author I can't remember now．（　　）

10．Finally，the young explorer，through a series of lucky accidents，arrived ______ was so-called the valley of death by the locals．（　　）

9．The result was not the same as they had expected，______ was rather disappointing．（　　）

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