【推荐1】Below ________ (be) some of the major causes of road accidents in connection with vehicles. （所给词的适当形式填空）

【推荐2】Behind Zibo’s sudden fame ________________(be) the efforts and services of the local government, as well as a good reputation of local businesses, which receive favorable reviews from visitors who share their experiences online. (所给词的适当形式填空)

【推荐1】The plan will extend protection to a significant number of areas that ________ (be) previously unprotected, bringing many of the existing protected areas for giant pandas under one authority ...(所给词的适当形式填空)

【推荐2】Present at the meeting ________ (be) teachers from different schools. (所给词的适当形式填空)

【推荐3】________(there be) no modern telecommunications, we would have to wait for weeks to get news from around the world.

【推荐1】You assume that something is true, but sometimes it ________(prove) to be false. (所给词的适当形式填空)

【推荐2】There are _______ goods in the supermarket, and the prices _______ from cents to dollars. The _______ attracts many customers. (vary)(所给词的适当形式填空)

【推荐3】The old scientist used to say that knowledge ______(come) from practice and he gained his experience by doing a lot of practical work. (所给词的适当形式填空)

【推荐1】Li Ming __________go to an English salon on Sundays. (used to/would) (用适当的词填空)

【推荐2】He ______ (pace) the room nervously. (所给词的适当形式填空）

【推荐3】Our friendship ________ (develop) over the weeks that followed.(所给词的适当形式填空)