—Smoking is bad for your health.—Yes, I know. But I simply can't________.
---Hey Julie, do you know a good dentist in this town?--- ______, but last time, my father took my brother to the Goliath.
Christina stood near the window, ______ she could see the amazing scenery.
This printer is of good quality. If it ______ break down within the first year, we would repair it at our expense.
---What a mistake!---Yes. I ______ his doing it another way, but without success.
---How long have you been here?---Only about five minutes. Henry and Simon ______ here with me.A.walk B. have walkedC. walked D had walked