A.is combining B.has combined C.that combines D.combination of
单项选择题The original research facility was （） in 1967 thanks to the foresight of our founding chairman.
A.build B.building C.to build D.built
单项选择题The oil exploration unit operates in very （） areas and requires staff members who can adapt to isolation.
A.far B.unaware C.remote D.absent
