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0口语想上7，建议反复收听，及影子跟读！一定要熟练到脱口而出！
As far as I’ve observed/noticed, …
Based on my personal observations, …
I guess/suppose.
I would say that...
Off the top of my head, ...
I’m of the opinion that…
As far as I'm concerned, ...
Personally, I hold the view that…
From what I can make out, it seems that…
There must be (several/numerous/multiple/countless) reasons, but the main one is that________,
Apart from that, __________/Another main factor is______
Last but not least, it’s worth mentioning that_________________
I believe it’s feasible for…to…
______should take action from now on…
It would be optimal if_______ could______
In the next few decades, I believe that...
It's very likely that...
If we look at the current trends, it seems that...
That’s a (tricky/intriguing/thought-provoking) question
I’ve never thought about it, but I guess_______
I'm no expert in_______
I’ve considered this before, but not in great depth.
Give me a few seconds to gather my thoughts.
I'm not entirely sure/I'm on the fence, It’s hard to generalize, but in most cases, _______
I suppose it varies from person to person, but broadly speaking, ___________
