She always helps her mother look after her baby sisiter even though going to school ___ most of the day.
The tour pal lost his way in the mountain; ________ made things worse was that it began to rain.
—Sir, I feel it complicated to apply to a university abroad.—Why not read our guide? This is ________ the relevant information is available.
The problem is ________ sometimes when we are given something on a constant basis, we start to take them for granted and forget being thankful for what we already have.
Life is ten percent ________ happens to you and ninety percent ________ you respond to it.
We believe ________ we can find out the wonder drugs to H7N9 bird flu.