China's reform and opening has been going on for ________ is like about 30 years now and it's really quite remarkable.
A．thatB．which
C．whatD．it
It is worth considering ________makes “I am a singer” so popular through China.
A．what B．why
C．how D．that
Life is like a tale. ________ matters is not how long it is, but how good it is.
A．Which B．That
C．What D．Whose
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
