Here are the correct answers for the questions based on grammar and context:

35. **A. are you working**
36. **A. has been studying**
37. **B. still**
38. **C. opens/ close**
39. **C. were negotiating**
40. **B. do/think**

For the sentences following the questions:

1. **D** (There’s no underlined part in the sentence; assuming it's correct)
2. **B** (The sentence needs “managed to write” for better flow.)
3. **A** (The correct phrase is "a great country can grow")

Let me know if you need further explanation!