---Where___?—I got caught in the heavy traffic, or I ___ here earlier.
My mother asked me______ enter my room.
Although he had______ many severe tests during his lifetime, he succeeded at last.
It is not a serious illness. I guess she will ______ soon.
The scientist wrote down_____ series of things to do with______ nature, such as a blue sky. A a, / B. a, the C. /, / D. /, the
----People should stop using their cars and start using public transport. ----________. The roads are too crowed as it is.