C. take this opportunity to do sth.(借此機會做某事。)

If sth. is allowed to take its course, it will be sure/bound to bring about/leave/entail desired (unexpected/grave/immediate/reverse/disastrous/far-re aching) effects/consequences/influences.(如果我們任其自然，某事物將肯定/必然會引起/導致/帶來理想的（出乎意料的/嚴重的/接踵而來的/適得其反的/災難性的/深遠的）效應/后果/影響。)

I would like to take the opportunity to express my opinions about STH.(我想利用這個機會來表達我對某事的看法。)

How long does it take to do STH.(做某事花費某人多長時間。)

C It take sb. to do sth.(表示花費某人時間做某事。)

(take sth into account) It is important for you to take comfort into account when you decide how to travel.(在決定以何種方式旅行時，把舒適因素考慮進去是很重要的。)

Take sb. Some time to do STH.(花某人多少時間去做某事。)

Therefore, it is necessary to take a correct attitude towards sth.(因此有必要對某事采取正確的態度。)