单项选择题—How about your trip to Hainan — It couldn't have been ______. Sometimes I went swimming in the sea; sometimes I lay on the sand.
单项选择题______ she realized it was too late to go home.
单项选择题Some researchers feel that certain people have nervous systems particularly to hot, dry winds. They are what we call ______ weather sensitive people.
单项选择题______ is best known for the technique of dramatic monologue in his poems.
单项选择题Salaries for()positions seem to be higher than for permanent ones.
A.legal B.optional C.voluntary D.temporary