simple - ad. easy to understand or do; not difficult or complex
since - prep. from a time in the past until now ("I have known her since we went to school together.")
sing - v. to make music sounds with the voice
single - ad. one only
sink - v. to go down into water or other liquid
sister - n. a female with the same father or mother as another person
sit - v. to rest on the lower part of the body without the support of the legs; to become seated
situation - n. the way things are during a period of time
size - n. the space occupied by something; how long, wide or high something is
skeleton - n. all the bones of a human or other animal together in their normal positions skill - n. the ability gained from training or experience
skin - n. the outer covering of humans and most animals
sky - n. the space above the earth
slave - n. a person owned or controlled by another
sleep - v. to rest the body and mind with the eyes closed
slide - v. to move smoothly over a surface
slow - v. to reduce the speed of; ad. not fast in moving, talking or other activities
发表于 2017-8-6 13:58:52