People often have difficulty facing reality when further scientific discovery challenges _______ they have previously thought to be settled facts.
A.what B.that C.who D.which
- Have you known each other for long?
- Not really. ________ we started to work in this school.
A.Just after B.Just when C.Ever since D.Just before
Despite Johnson’s being green at his job, the work he did was ________ and thus won the manager’s approval.
A.familiar B.demanding C.adequate D.primitive
The massive appeal of China’ s online literature has also ________ its reach to millions of readers worldwide.
A.evolved B.slipped C.extended D.shaped
However, most of the fires this year are believed ________ by farmers, who use fire as a traditional way to clean land.
A.causing B.to be caused C.having caused D.to have caused
Don’t be afraid! If the person standing in front of us were a witch, she _______ us into frogs already.
A.would turn B.would have turned C.may turn D.may have turned
