As _______ general rule, the working temperature of the installation (设备) is _______ more important consideration than the working pressures.
Andeison entered the classroom, ____book in ___hand.
She studies ___ medicine before she turned ___ writer.
A non-smoker can hardly imagine__ pleasure of having__ smoke after a meat.
British people always talk about wether.
He is doctor at all. Don’t trust him.