Onlywhenyouhaveobtainedsufficientdata________cometoasoundconclusion.
A、canyouI found ________ to answer all the questions within the time given.
Tosucceedinascientificresearchproject________.
Wood does not conduct electricity; ________.
________ (fail) several times, they need some encouragement.
Matter is the name ________ (give) to everything which has weight and occupies space.
