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單項選擇題

He put forward a theory,（）of great importance to the progress of science of technology

A.I think which is
B.which I think is
C.which is I think
D.I think it is

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單項選擇題

He looked quite healthy though he was（）

A.in seventy
B.in his seventies
C.at seventies
D.age of seventy

單項選擇題

He likes to swim（）

A.and to play football
B.and playing football
C.but play football
D.and he also likes playing football