To succeed in a scientific research project ________.
A、oneneedstobepersistentA
暂无解析
Thisdiploma(毕业文凭)________thatyouhavecompletedhighschool.
Tosucceedinascientificresearchproject________.
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
Hardlyhadhefinishedhisspeech________theaudiencestartedcheering.
