87. Terry was so tired that he couldn’t walk ________.
--I find reading comprehension the hardest in learning a foreign language.---Well, _____ you’d better practise reading short passage every day.
---How can I get to the island you mentioned? ---You can’t get there_____ by swimming.
______the end of last term, every student in the school, I think, has taken at least five maths tests.
We often call Martin Luther King M.L.King ___ .
Look out____the traffic when crossing the road.