A  63. A. could they find      B. should they find       

 C. had they found     D. did they find

D  64. A. complete      B. contrary      C. concrete      D. content

A  65. A. mistake       B. content       C. error        D. shortage

C  66. A. helpful       B. heavy         C. healthy       D. high

D  67. A. Consequently      B. Fortunately       C. Lately       D. Finally

B  68. A. while          B. when         C. whenever          D. which

A  69. A. lie       B. lay        C. laid         C. lain

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