根据句意及各题括号中所给的汉语意思，从下面的方框中选取合适的单词或词组，用其适当的形式填空。

1．He was calm in the ________(出席；到场)of danger．

2．Now, the price of the rice is ________(逐渐地)rising．

3．When are you going to ________(出版)this works of yours?

4．To mum's ________(失望)，her child failed in the exam．

5．The news that tsunamis caused more than 100,000 deaths ________(传播)throughout the world in a short time．

6．Several days ago, a bomb ________(爆炸)near the shop, killing 10 persons．

7．They had a ________(激烈的)quarrel over Dave's drinking．

8．There have been several new ________(发展)in elec-tronics．

9．What do we produce when we ________(化合)copper and iron?

10．What do we mean when we say we are studying a subject ________(科学地)?

11．What are the most important ________(技巧)if we need to be real scientists?

12．Eight ________(乘)by two is sixteen．

13．A great ________(大量的)of rocks had fallen from the cliff and now blocked the road．

14．The social ________(制度)needs to be improved．

15．Man can't live without water and ________(氧气)．

16．Please ________(挑选出)three more sentences from the reading passage with subject clauses．

17．Smoking is ________(有害的)to health．

18．An astronomer observes the space through ________(望远镜)．

19．Wood ________(漂浮)on water．

20．Don't be silly．Such a thing doesn't ________(存在)．