A number of birdwatchers ______in Zhalong Nature Reserve. The number of them____500.

Only when public attitudes towards the disabled advance as far as laws have ________ be able to take the rightful place in society.

Tom can’t find his gloves. Are these blue gloves his? —No, they ______ be his. His gloves are black.

Mrs Brown came to China ______ 1996. [ ]

________five minutes________ before the last train left, we arrived at the station.