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请在（52）处填上最佳答案。
请在（52）处填上最佳答案。A．automatically B．accidentally C．tremendously D．usually
根据以下材料，回答题。请在（51）处填上最佳答案。A. tryB. tried C. trying D. h
根据以下材料，回答题。请在（51）处填上最佳答案。A. tryB. tried C. trying D. having tried
The project funded by the National Science Foundation
The project funded by the National Science FoundationA．was first proposed by som
根据上篇材料和选项回答题：Depending on where they occur，hurricanes have _
根据上篇材料和选项回答题：Depending on where they occur，hurricanes have __________．
People cannot survive without plants.
People cannot survive without plants.A．Right B．Wrong C．Not mentioned