-Is James at home?-No, he __________ Ya'an to be a volunteer.A. has gone to B. has been to C. is going toD has to
Our teacher told us that light _____ much faster than sound.
In our class _____ of the students _____ girls.
—It seems _____ you like to work with children. —Yes, they are so lovely.
Compared with last year, our pay _____ about ¥500 every month.
China has the _____ population in the world.