—Has the little girl passed ______ P.E. test?—She has tried twice, and the teacher will allow her to have _____ third try.
.China is one of the largest countries in the world, _______ 9.6 million square (平方) kilometers.
The old sick lady entered the hospital, ______ her two sons.
_______ many times, he still couldn't understand.
Many things _______ impossible in the past are very common today.
The students in the university are all taking courses _______ a degree.