It was in the lab, ________ was taken charge of by Professor Curie, _______ they did the experiment.
with a difficult situation, I decided to ask my parents for advice.
The visit of the police was the lost child.
The teacher together with the students _____discussing Reading Skills that ______newly published in America.
. John hadn’t been able to quit smoking at once; he had to control his smoking desire .
----I wonder how much for your services. ----The first two are free the third one costs $30.