9.??An amazingly precise biological clock within us regulates sleep and waking,and also (synchronizes) a vast array of biochemical events in our bodies. A. regulates afterwards B. works off in an efficient way C. causes…to occ...

6.??Dorothy worked alongside him,in the beginning,until he proved himself;then gradually she (relinquished) more of the work to him and concentrated on her garden and flowers,and the housework A. gave up B. offered C. took ...

19.??We need a chairman _______. A. for whom everyone has confidence B. in whom everyone has confidence C. who everyone has confidence of D. whom everyone has confidence on. ...

14.??What he said just now had little to do with the question _______ discussion. A. on B. in C. under D. at ...

9.??These goods are _______ for export, though a few of them may be sold on the home market. A. essentially B. completely C. necessarily D. remarkably ...

4.??We agreed to accept ______ they thought was the best tourist guide. A. whatever B. whomever C. whichever D. whoever ...

19.??The patient＇s health failed to such an extent that he was put into _______ care. A. tense B. rigid C. intensive D. tight ...

14.??However, at times this balance in nature is _______, resulting in a number of possibly unforeseen effects. A. troubled B. disturbed C. confused D. puzzled ...

9.??In 1914, an apparently insignificant event in a remote part of Eastern Europe _______ Europe into a great war. A. inserted B. imposed C. pitched D. plunged ...

4.??The man in the corner confessed to _______ a lie to the manager of the company. A. have told B. be told C. being told D. having told ...