Recent pressure at work may___ his behavior.
| A．stand for | B．leave for | C．pay for | D．account for |
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 |