The flu is believed _____by viruses that like to reproduce in the cells inside the human nose and throat.
We can’t against other countries in trade if we don’t develop our national economy(经济).
The huge statue(雕像) of the former leader was pulled down, and it lay on the ground _______ .
It’s important for us to use a word or phrase according to the in language studies.
Don’t talk round the question; come to the point.
She completely and had to go into hospital.