未知题型 Although many people view conflict as bad, conflict is sometimes useful ___________ it forces people to test the relative merits of their attitudes and behaviors. A) by which B) to which C) in that D) so that

未知题型 .______________________ （只有集中精力于工作) could he forget his own troubles.

未知题型 I would appreciate _____ it a secret.(A) your keeping (C) that you keep(B) you to keep (D) that you will keep