【单选题】— We decided ______ trees on the hill, but we haven't decided how to get there. — Let's go by bike, ______? [ ]
【简答题】When we the museum is not decided.
【简答题】As the weather was fine, we decided to climb the mountain.
【简答题】(It's a good idea if we) inform all our customers by e-mail._______________________ inform all our customers by e-mail
【单选题】This house is really expensive. We are looking for an expert to() it before we decided to buy it.
【单选题】Rarely ()the opportunity to inform. our customers of such good news.
【简答题】随着老年人口的绝对数和相对数的增加, 日渐形成并扩大。