Usually, I’m working in areas ____ have no water such as Kenya and Sudan, ____ famine is a pollution.
--- How do you find Mr Li’s lecture?--- Good indeed. It_______ many problems we have come across in our study.
_____it is to jump into a river to swim on such a hot day.
________ the final exam________ up soon, we should get down to our studies.
In recent years, with the help of our teacher, I have made_____ rapid progress in ____math.
Several weeks had gone by _______ we realized the painting was missing.
_______ we realized the painting was missing.