With the successful launch of Tiangong-I, which was ______ breakthrough in space field, China's space dream took a step closer to ______ reality.
Only _____ as an interpreter _____ how important it was to practise spoken English.
We had a wonderful holiday; only the last two days were _____spoiled by the weather.
Those in the living room, which are the most ______ to hurt us, are computers, televisions and lamps.
The teacher rather than the students _____ referring to Reading Skills that _____newly published in America.
________ in 1636, Harvard is one of the top universities in the United States.