46.This morning in the class, our teacher lost his _______ at last because he could not stand any more.
A. temper B.terror C.verse D.contain
47.It is not ---_______ for me to return all the books to the library now because I still need some of them for my research.
A. continuous B.difficult C.convenient D.sufficient
48.When traveling alone in the mountains, you’d better take a _______ with you in case you get lost.
A. compass B.compress C.complse D.campus
49.As a teacher, you should not _______ the students from asking questions in class.
A. ruin B.restrain C.import D.impose
50.If you have any problems during your study here, please do not _______ to call me for help
A. hesitate B.despair C.urge D.request
46.A 47.C 48.A 49.B 50 D