高三英语冲刺单项选择题精选及答案
高三英语冲刺单项选择精选1000题及答案[一]
从 A, B, C, D四个选项中,选出可以填入空白处的最佳答案:
1. ______- Jack?
-- _______.
A. Present, Sir. B. I am, Sir C. Here, Sir D. Yes, Sir.
2. ---What are you busy with ?
--- We are carrying out a research ____ the causes of cancer.
A. into B. onto C. to D. in