1. When I felt tired during my work, I leaned ____ the big tree to have a rest.
A. against B. above C. besides D. on
【答案】A
【解析】考查介词against。Lean against the tree：斜靠在树上。
2. The situation is already ____ our control. I think a war is likely to break out between two sides.
A. within B. on C. without D. beyond
【答案】D
【解析】考查介词beyond。Beyond our control：无法控制。
