lt's p_____that l'ii go walking instead of swimmingmany stories told how brave dogs helped people in t______.lt was sent up in a manmade earth satellite in 1957 by R_____scientist.dogs can h____and s______better than man ,but they can not see so well

lt's p_____that l'ii go walking instead of swimmingmany stories told how brave dogs helped people in t______.lt was sent up in a manmade earth satellite in 1957 by R_____scientist.dogs can h____and s______better than man ,but they can not see so well
lt's p_____that l'ii go walking instead of swimming
many stories told how brave dogs helped people in t______.
lt was sent up in a manmade earth satellite in 1957 by R_____scientist.
dogs can h____and s______better than man ,but they can not see so well.
还有两题
dogs have been man's good friends for t_______of years.
a dog may l______for about 12 or 13 years.

lt's p_____that l'ii go walking instead of swimmingmany stories told how brave dogs helped people in t______.lt was sent up in a manmade earth satellite in 1957 by R_____scientist.dogs can h____and s______better than man ,but they can not see so well
lt's p(ossible)that l'ii go walking instead of swimming
many stories told how brave dogs helped people in t(rouble).
lt was sent up in a manmade earth satellite in 1957 by R(ussian)scientist.
dogs can h(ear)and s(mell)better than man ,but they can not see so well.
dogs have been man's good friends for t(housands)of years.
a dog may l(ive)for about 12 or 13 years