___ there are living creatures in the outer space as those on Earth hasn’t been proved until now.
A.How | B.When | C.Where | D.Whether |
With so many orphans _______, the charity organization calls for more donations.
A.to look after | B.being looked after | C.to be looked after | D.looked after |
Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and
experts can’t be exactly sure about its use.
A.had been found | B.was found | C.has been found | D.would be found |
Some biologists believe this is an ancient survival strategy, _______ a diet with 30 percent
fewer calories than usual increased life span.
A.for which | B.to which | C.of which | D.in which |
The county, ________ in the north of Shanxi, has a history of more than 1,400 years.
A.located | B.to be located | C.being located | D.locating |