You need to perform CPR on your neighbour after she collapsed and stopped breathing. How many chest compressions to rescue breaths should you do?
举一反三
- How should I stand when I make a presentation?( ) A: You should move around a bit. B: You should do some acrobatics. C: You should keep your hands by your side. D: You should make as many gestures as possible.
- How _____ bottles of oil do you need? A: much B: many
- If you see somebody you know just after a short time，offer your hand and say 'How do you do?'
- How many steps do you need to follow to book flights online?
- “How many pairs of shorts should you and your brother bring?” “How many pair of shorts” is __________of the sentence.