Some molecules are large enough ________ (see) under the electronic microscope.
to be seen
暂无解析
________(fail)severaltimes,theyneedsomeencouragement.
Hotmetal________asitgrowscooler.
He________methathedecidedtoleaveonMonday.
Matteristhename________(give)toeverythingwhichhasweightandoccupiesspace.
Thisdiploma(毕业文凭)________thatyouhavecompletedhighschool.
