Selecting a proper personal computer is no easy task because technology _____ so rapidly.A will change B will have changed C is changing D has changed
After the long journey ,the three of them went back home,______.
I wonder if your brother will go to the party. If he does, so ______mine.
.All the students were listening carefully, with their eyes _____on the teacher.
-----______you received the news ? ------Last night .
My parents have promised to come to see me before I ____for Africa.