Mr. Smith would have come to see you if it had been possible, but he __________ so busy.
【2015·福建】—Where is Peter? I can't find him anywhere. —He went to the library after breakfast and his essay there ever since.
【2015·陕西】Mary really hard on his book and thinks he’ll have finished it by Friday.
【2015·陕西】At college, Barack Obama didn’t know that he the first black president of the United States of America.
【2015·四川】More expressways in Sichuan soon to promote the local economy.
【2015·天津】Jane can’t attend the meeting at 3 o’clock this afternoon because she ______ a class at that time.