Only when I lost the opportunity to take my first job ____ how important it was to me. A. I realized B. I had realized C, had I realized D . did I realize
For Chinese Dream, many people dream of_______ a good chance for a better job.
Not only ________learn a foreign language, but also ______ master it well.
______ with a moon rover(月球车) called “Yutu” (Jade Rabbit) , Chang'e-3 successfully landed on the moon.
All their attempts to rescue the child from the burning building were _____, and he died soon.
Be careful when you cross this busy street. _____, you may get run over by a car.