577.The woman pulled her hat low down ______ her eyes in order not to be recognized by the angry crowds.
A.under
B.below
C.on
D.over
578.Do come here tomorrow ______ we,as planned,will enjoy the wonderful performance together.
A.otherwise
B.or
C.and
D.therefore
577.答案是D;
考查介词词义辨析。句意:她把帽子拉下遮住了眼睛,以免被愤怒的人们辨认出来。
578.答案是C;
祈使句+and+简单句。