—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
_ his father had come, his face lit up.
With all the magazine he needed _ ,he left the library.
Its this TV set which you wish _ ?
. Going out for tea with friends _increasingly popular during the past twenty years.
Key: C
There are waiting-rooms in the new station, _ about 1,000 passengers.