1. ________confidence and the necessary equipment, they failed to rescue the 42 miners trapped in the coal mine.
A. Lack of B. Lacking of C. Lacking D. Having lacked
2. It was very difficult to rescue the drowning boy in the sea. One moment the rescue workers _______him but the next moment they _____.
A. caught sight of; lost B. caught the sight of; lost his sight
C. caught sight of; lost sight of him D. caught the sight of; lost their sight of him
