单句语法填空
1．The island is equally (equal)attractive in spring and autumn because of the pleasant weather in both seasons.
2．The lecture is worth listening (listen) to，though it is rather long.
3．Many millionaires and billionaires are keen on contributing to charities.
4．The death and destruction were beyond description (describe)．
5．His elder sister is lacking (lack)in patience.
6．The woman always referred (refer) to his husband as “my old man” when he was alive.
7．So far as I know，English is not difficult to_learn (learn)．
8．I am sorry to_have_kept (keep)you waiting for such a long time.
9．He's uncertain whether he is equal to the task.
10．In addition (add)，you should pay attention to your pronunciation.
