It is still unknown_______ caused the accident last Saturday.
—Hi, Tom. Do you still smoke?—________. It's three years since I smoked.
—I'd like some bread and some fish. What about you, Tom?—________
—I'm afraid it's going to rain this afternoon.—________ Look at the dark and cloudy sky.
—Mr. Green, can you spare me a few minutes? I still have some questions about your assignment.—________.
—I'm going to visit Tom tomorrow. Will you go with me?—________ But I'm going to eat out tomorrow night with John.