Have you ever visited the Water Cube?— YesWhen I served as a volunteerin Beijing, I it twice.[ ]

Listen! Marry is singing in the next room.– It __ ___ be Marry. She has gone home.

下列句中加点的熟语，不能用括号中的四字格成语替换的一句是    （    ）

Thequestionnaire takes ______ ten to fifteen minutes to complete and can be usedalong with the assessment interview.

e me, but may I have access to the Wi‑Fi here I’d like to take some photos of the delicious food and update my microblog.—- . Here is the key to it.