I wonder if he could get it ________ (do) before tomorrow.
done
暫無解析
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
________(fail)severaltimes,theyneedsomeencouragement.
Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
Onlywhenyouhaveobtainedsufficientdata________cometoasoundconclusion.
ComradeLi________beinBeijingbecauseIsawhimintownonlyafewminutesago.
