單項選擇題It is useful to science()the earth as an object in space.

A.to consider
B.which considers
C.considers
D.the consideration of


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1.單項選擇題We must()that the experiment is controlled as rigidly as possible.

A.assure
B.secure
C.ensure
D.issue

2.單項選擇題Be careful,()you'll fall down.

A.on the contrary
B.or rather
C.or else
D.as for

3.單項選擇題()the movie I would have finished my paper last Sunday.

A.In spite of
B.Butf or
C.Because of
D.As for

4.單項選擇題The boy ran out of the classroom without the teacher's()

A.command
B.conviction
C.consent
D.compromise

5.單項選擇題I'm sorry I forgot to write; I had so much else()my mind.

A.over
B.for
C.on
D.about