一、单选题：（2/15=30）
A. get over B. get in C. get along D. get through
2. The research is so designed that once _______ nothing can be done to change it.
A. begins B. having begun C. beginning D. begun
3. _______ danger, the man rushed into the burning house to save the old man trapped there.
A. Thanks to B. But for C. Instead of D. Regardless of
4. ----The light in the office is still on.
----Oh, I forget _________.
A. turning it off B. to turn it off C. turning off it D. to turn off it
