Over the years, people have learned from ants that teamwork and perseverance are indeed two key ______ to success.
A. certificates B. ingredients
C. approaches D. instructions
If a friend snaps at you or is unfriendly， step back， and with a sense of compassion， try to experience life from his____．
A． perspective B．priority
C．privilege D． policy
It may be necessary to stop _____ in the learning process and go back to the difficult points in the lessons．
A． at intervals B． at random
C． at ease D． at length
—Where would you like to sit? In the corner or near the platform?
—______．I would like to sit by the piano so that I can watch the musician play．
A． Either B． Neither
C． None D． Both
Life is like __________ ocean; only __________ strong-willed can reach the other shore.
A. an; the B. the; a C. the; / D. /; a
--- Kim, give me your report by 1O am.
--- __ have you been in charge of this project?
A. Since when B. By whom
C. For what D. From where
