MOUNT PINATUBO, ( WHICH/ WHO/ WHOM/ WHOSE ) IS A VALCANO IN PHILIPH...

3. - REVISION 89 TRAC NGHIEM LOP 9 DOC
REVISION 89 TRAC NGHIEM LOP 9 DOC

3. Mount Pinatubo, ( which/ who/ whom/ whose ) is a valcano in Philiphines, erupted in 1991.