— What should I do with this passage?—_____ the main idea of each paragraph.
— Who should be responsible for the accident? — The boss, not the workers. They just carried out the order ______.
Sorry to say I’m busy now and can’t help ______ the lab.
It is widely believed that smoking _________lung cancer.
New iPhone went on sale on Friday with ________ bigger screen and 4G wireless technology, as ________ company seeks to keep its competitiveness(竞争力).
--Excuse me, sir, _______________ --I’d like a cup of coffee and two pieces of bread.