Whenever a patient needs an injection of Penicillin, the doctor does need to make sure whether his patient is ___ to the medicine.

   As we know, the coming of radio in this century made ocean sailing much ______.

Those T-shirts are usually ＄35 each, but today they have a (an)＿＿＿price of ＄19 in the shopping center. 

______ that he has no qualifications in business management, Ken plans to gain the necessary skills by taking a part-time course.

(2014·石家庄高中复习教学质检)I always try to be________to others when walking my pet dog along a pavement and step to the side with my dog to let them pass by.