Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.
A、surroundWewon’tallowanyforeigncountryto_______inourinternalaffairs.
Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
Pleasebeserious.Iamnot_______.Youshouldconsideritcarefully
Pinetreesareusuallybelievedto_______coldweather.
Itisnot---_______formetoreturnallthebookstothelibrarynowbecauseIstillneedsomeofthemformyresearch.
