__________ to sun, rain and wind fora long time, the stone split（裂开）.

Rather than ________ on a crowded bus , he always prefers ________ a bicycle

Smith was overweight, so the doctor recommended that not onlyhave less fat and meat, but also he.

下列各句中，表达得体的一句是

Did you visit the zoo? — No, we_______have visited it, but we spent too much time shopping.