. It used to be thought _____ the Earth was flat.
A.as | B.when |
C.since | D.that |
They chatted ____ coffee about their experience as volunteers during the charity.
A.over | B.on | C.to | D.with |
A programmer may make mistakes in a wrong analysis of the situation _____ the programme was based.
A.which | B.of which | C.on which | D.of what |
__________ the directions exactly, you will never get confused.
A.Follow | B.To follow | C.Following | D.Followed by |
Some people have called ________ the worst period ever for Pop Music.
A.1990’s | B.the 1990 | C.the 1990’s | D.1990s |
Only after he had spent several nights working on the math problem _______ to wonder whether the problem was wrongly set.
A.that he began | B.did he begin | C.then he began | D.so that he began |