You should have blended the butter with the sugar thoroughly（　）

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spread beaten mixed covered

must be must have been should should have been

should come ought to come should have come ought have come

spread mixed beaten covered

should not make should not have made ought not have made must not have made

should go should have gone might go may have gone

mustn't; should do needn’t; should have done may not; should do can't; should have done

would not run would not have run should not run should not have run

I NOW HAVE THE WATCH. I NOW HAVE THE CONN. YOU NOW HAVE THE WATCH. YOU NOW HAVE THE CONN.

spread． mixed beaten covered

should go should have gone might go may have gone

had studied hard; would have been should have studied hard; should have been had studied hard; would be would study hard; must have been

spread mixed beaten covered

should inform me should have kept me informed should have been informed should keep me informed

correct; most wrong; much more easily; even careless; bu