The contract is very important for both of you, so studying it ________before signing is necessary.

I’mvery sorry to keep you _____ for a long time

Would you please tell me_________— In a small village near Niingbo.

Evidence gained from observation and experiment is often used to _______ a scientific theory.

to, Madam—________at the Baiyun Hotel, No 11 Sanlitun Road, Chaoyang District, please.