Can I suggest reasons for changes shown on graphs or charts?
1. 我可以給出圖表中數(shù)據(jù)變化的原因嗎？

No, you shouldn't try to explain reasons for the data in writing task 1. Just describe what you can see.
不可以。在短作文中，你不應(yīng)該試圖解釋數(shù)據(jù)背后的原因。只要描述你看到的即可。

Can we use symbols like $, ￡ and % in writing task 1?
在短作文中，是否可以使用$、￡、%等符號(hào)？

Yes, I usually prefer to use these symbols instead of full words like "per cent". For native speakers, it's very normal and natural to do this.
可以。通常來說，我更喜歡使用這些符號(hào)，而非類似per cent這樣的文字。對(duì)于英語為母語的人來說，這種做法非常普遍和自然。

When describing a map (writing task 1), can we use north, south, east, west even if no compass is shown?
短作文中，描述地圖時(shí)，如果沒有出現(xiàn)指南針，是否可以使用東南西北？

Yes, I often do. I think it's fine to assume that the top of a map is north.
可以，我經(jīng)常這樣做。我認(rèn)為上北下南的假設(shè)十分合理。

Do I need to include all of the data in my task 1 essay?
短作文中，我需要把所有數(shù)據(jù)都寫進(jìn)去嗎？

No, the question will always ask you to select key points. There is usually too much data for a 150-word essay. Also, your ability to select key data will impress the examiner.
不需要。作文題目總是要你選擇關(guān)鍵點(diǎn)。通常情況下，所有數(shù)據(jù)對(duì)于一篇150字的文章來說顯得太多了。此外，你選擇關(guān)鍵數(shù)據(jù)的能力也會(huì)給考官留下印象。