Studyhard,__________youwon’t pass the coming Englishexam.[A]and[B]or[C]but
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[A]that[B]when[C]who[D] which
[A]bottle [B]cup [C]jar [D]bell
Pay foot ball than play basket ball.[A]would rather[B]had better[C]prefer
It is difficult to send people to other planets because of__________.[A]the lack of capacity of space exploration vehicles[B]the financial expenditure involved in space travel[C]controversial nature of space travel[D]the uncertain future of space exploration