Chinese students find it difficult to understandnative speakers when in London.—Exactly, ______ they’ve learned a lot about grammarand known many words.

It was not until the end of last year _____ theeconomy in our country began to develop rapidly.

The boy_____ that his cock_____ an egg yesterday.[ ]

__________give him a watch

Having been ill in bed for nearly a month,he had a hard time _____ the exam. [ ]