英語四級填空小練習(xí)
1. _______________ (隨著工商業(yè)的發(fā)展),the number of trees in many big cities has dramatically reduced.
2. Travel can widen our knowledge, _____________ (擴(kuò)大我們的.眼界),and make one open-minded as well.
3. Cars are responsible for most of the smog in cities, _______________ (這已經(jīng)對環(huán)境造成了嚴(yán)重的污染).
4.Modernization will be entirely possible in the first half of the 21st century, as long as we ________________(堅(jiān)持認(rèn)為)that economic development is the center of all our work.
5. He was convinced on the basis of ____________(當(dāng)時已出現(xiàn)的情況)that there would be a long and difficult struggle.
答案與解析：
1. With industries and business developing quickly
2. broaden our horizon
3. which has seriously polluted the environment
4. hold an idea/ insist on the idea/ stick to the idea
5. what had appeared by then
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