500多年前,一艘载着天然苏打晶体的商船在航行中搁浅,船员们便在附近的沙滩上用几块苏打晶体支锅煮饭。之后他们惊奇地发现,锅下苏打在沙粒接触处出现了许多晶莹发亮的珠子。请你分析一下,这种珠子可能是( )
He could’t _____ and _____. A.run,jump B. says ,singsC. walked ,ran
In this photo, the ducks _______ in the water. A. swimingB. are swimming C. are going to swimming
The little girl learned ______ and write two yeas ago. A. toread B.reading C. to reads
The deaf man can’t _____ anything. A. see B. hear C. speak
He ____born ___2000. A. is,onB. are, inC. was, in