I’llnever forget the day_____ the great scientist came to our school and gave us aspeech.

If you ________ yesterday，you ________ with your mother now.[ ]

Where have you been recently?—I ________ in Beijing on business for a week last month.[ ]

It is widely believed that smoking______ lung cancer?[ ]

Which coat is _____ on me, the blue one or the black one –The blue one .