A cut in the tissue is easy to heal but a(an) _______ to the heart, if possible, takes a long time to do so.
35.—Are you still very busy? —Yes,I ______ the report for the manager and it won’t take long.
34.I don’t say I am against their plan. But the trouble is _________ they do doesn’t agree with what they say.
33.Not until he called the secretary three times ______ that the manager went to an important meeting.
32.When and where to go for the on-salary holiday still .
31.Scientists have been curious about that fish. How does it live _______most fish would freeze to death?