while walking along the river,they suddenly heard somebody _____for helpA called B to call C calling D calls

( ) We were walking along the river _____ it suddenly began to rain.A.as B.while C.when D.then ( )I was walking along the street ____I met a friend of mine.A.while B.when C.as D.then ( )I was walking along the street ____I meet a friend of mine.A.while B.when C.as D.then while walking along the river,they suddenly heard somebody _____for helpA called B to call C calling D calls They were walking along the shore ______a hugeThey were walking along the shore ___ when ____ a huge wave appeared out of nowhere,sweeping them out to see.A when B while C as为什么B C One day while I ____ along the street,I ____ someone calling.A.walked…was hearing B.was walking…has heard C.was walking…had heard D.was walking…heard为什么选D不选C while i was walking along the lake,I saw some fish ( ) out of the waterA.jumped B.to jumpC.jumping D.are jumping明天中考,求讲解, I was walking along the street _______ I met a friend of mine.A.while B.when C.as D.since 要原因 29.Jim was walking along the river_______ he heard someone_______ Help!Help!A.when; shout B.while; shouting C.as; to shout D.when; shouting He was walking along the river ________ he saw a little dog struggling in the water.A. while B. when C. as D. which选A 说明理由 you look unhappy ,what's wrong with you i ( )my wallet while i was walking along the streetA missed B dropped C fell Dlost A UFO l------- right in frout of me while I was walking along the street (以L为开头的单词） About ten years ago,I was walking along this quiet London street one evening___it suddenly rained.A.while B.when C.as D.before解释一下为什么,为什么不选D？ while i was walking along the street last night,i heard a _____ voice and felt very _____A,scaring,scaring B,scaring,scared C,scared,scared D,scared,scaring she is walking along the street at night?语法对吗 Amy enjoys walking along the b( ) in summer, Who is the man walking along the lake? Walking along a lake in the coid winter,