填空题 Many companies have their ____ in Beijing and Shanghai.

单选题 The new laws gained widespread ______.

单选题 The reading ability of the students is _____.

单选题 The terms of the contract are _____ to us.

单选题 We should _____ the customers’ needs.

单选题 Mary made a few_____ remarks.

单选题 Wood is a poor ______ .

单选题 We decided to ______ an experiment.

单选题 Please allow me to _____ Mr. Black to you.