51. the horse won't be well enough(run)----to run-----in tomorrow 's rase. he doesn't seem (have)-to have---recovered from his long journey.
52. at first i enjoyed (listen)---------listening---------------to him but after a while i got tired of (hear)---hearing---------the same story again and again.
53. it is usually easier (learn)---to learn---------a subject by (read)---reading-----books than by(listen)----listening-------------to lectures.
54 it wouldn't be safe(start)-------to start--------down now ;we will have (wait)----waiting--------till the mist clears.
55. after(discuss)-----discussing-----the matter for an hour the committee adjourned without(have)-----having------reached any decision.
56. it's not much use (have) ---------to have-----------a bike if you don't know how (use)------to use-------it.
57 i distinctly remember(pay)-------paying----------him. I gave him 2S(2 đô la)
58 did you remember (give)-----to give-----------him the key of the safe ?- no,i didn't. I will go and do it now.
59. please forgive me for (interrupt)--------interupting---------you but would you mind (repeat)---repeating-------that last sentence.
60. he made a lot of money by (buy)------buying------tickets in advance and (sell)-----------selling-------- them twice the price on the day of the match.
* Bạn có yêu cầu giải thích thì mình nhắc luôn là chả có gì để giải thích cả, cái bạn cần là học thuộc hết thì sẽ làm được thôi ^^ đây toàn là công thức thôi (phần to v ving), mình làm thì thấy có cấu trúc trùng nhau bạn cố gắng ghi ra sau mỗi câu nhé, học thuộc và biết vận dujng vì có những câu chia cả to v hoặc ving đấy