Exercise 9. Choose the best answers.
1.- "Here's my phone number".
- "Thanks. I'll give you a call if I
B. need
A. will need
2. The patient will not recover unless he
A. had undergone B. would undergo C. undergoes
3. If it.
A. be
4. If we meet at 9:00, we
A. have
B. is having
5. If you ...
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