The author of the report is well _____ with the problems in the hospital because he has been working there for many years.
John learn French and Spanish at the university. He is good at French, but can’t speak thefluently.
A great number of visitors __________ attracted to my hometown, and the number of foreigners there _______ quite large.
China always plays ___ active part in fighting against ___natural disasters. A. /; the B. an; the C. an;/ D /; /
It was in the lab was in the charge of Mr white they did the experiment.
of the speech, he took out his novel to read.