While you _________ your trip, I was busy ________ for my exams. A. enjoyed, preparing B. were enjoying, preparing C. were enjoying, to prepare
— When do you usually take a walk? —______ the morning.
— How_______ the medicine tastes! —Yes. But the medicine will really work soon after you take it.
—Do you think ________will be robots in the school in 20 years? —No,________.
—What were you doing when he ________“hello”to you? —I _______in front of the blackboard.
—Don’t stop trying ________ your dream comes true. —Yeah.