Is ________ man’s ability to reason that sets him apart from other animals?
A.one | B.this | C.it | D. / |
Einstein liked Bose’s paper so much that he ___ his own work and translated it into German.
A.gave off | B.turned down | C.took over | D.set aside |
The sentence wants ____ once more.
A.explaining | B.to explain | C.being explained | D.explained |
--Why are you so anxious?
--It isn’t your problem ____.
A.on purpose | B.in all | C.on time | D.after all |
The two sportsmen congratulated each other ____ winning the match by shaking hands.
A.with | B.on | C.in | D.to |
He began to take political science _________ only when he left school.
A.strictly | B.truly | C.carefully | D.seriously |