Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
Tosucceedinascientificresearchproject________.
________(fail)severaltimes,theyneedsomeencouragement.
________(catch)intherain,hewaswettotheskin.
Hardlyhadhefinishedhisspeech________theaudiencestartedcheering.
Night________(fall),wehurriedhome.
