AnA4sizedpanel(太阳能板)putontothebackofajacketcosts__________US$15.Itcould__________acellphoneduringasummerwalk.
A、atmost;work—You look very pale. You __________ very tired. — I didn ’ t sleep at all last night.
__________of the land in that district __________ covered with trees and grass.
Are you _________ your classmates well?
Mr.Smithisingoodhealthnowforitisquitealongtimesincehe__________.
Onewaytounderstandthousandsofnewwordsistogain__________goodknowledgeofbasicwordformation.
