单项选择题
The bird feeder（）to keep squirrels from getting to the birdseed.
A．has designB．is designedC．was a designerD．has been designing
单项选择题 On April 3rd, we will hold a meeting with the（）of our business units.
单项选择题 Dr. Corley holds a Ph.D. in anthropology, and（）a book about the Nile delta last October.
单项选择题 (8)（）
