题目内容

I’m not absolutely certain, you see, ___________whether I should say it.

A. because of
B. owing to
C. as to
D. sort of

查看答案
更多问题

____________caused the plane crash remains unknown.

A. Why
B. How
C. When
D. What

___________that China has the best and brightest scientists to solve the problems is not just good policy, but something personal.

A. Ensure
B. Ensuring
C. Ensured
D. To ensure

You become more ____________in prison than you had been before, ________ regularly.

A. discipline, study
B. disciplining, studying
C. disciplined, studying
D. disciplining, studied

No country can really develop __________its citizens are educated.

A. if
B. when
C. because
D. unless

答案查题题库