It hasn't been made clear ________ the new underground line is to be open to traffic.
A.whenB．that
C．whatD．where
The tour pal lost his way in the mountain; ________ made things worse was that it began to rain.
A．that B．what
C．which D．who
—Sir, I feel it complicated to apply to a university abroad.
—Why not read our guide? This is ________ the relevant information is available.
A．what B．how
C．where D．why
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.
A．that B．how
C．where D．which
Life is ten percent ________ happens to you and ninety percent ________ you respond to it.
A．which; how B．what; what
C．that; that D．what; how
We believe ________ we can find out the wonder drugs to H7N9 bird flu.
A．when B．whether
C．what D．that
