They speak perfect English. How long have they learnt it— ______ they were seven years old.

下列各句的句式不同于其他三项的是

He felt nervous when facing the judges, and _______.[ ]

We are too busy to take _______holiday at present.— But I think we’ll be able to take_______ two weeks away.

How do you deal with the disagreement between the company and the customers? — The key _____ the problem is to meet the demand _____by the customers. [ ]