37. Many young people in the West are expected to leave ______ could be life’s most important decision --- marriage---almost entirely up to luck.
They have no idea at all ____.
________ on the top of the mountain is an ancient tower dating back to hundreds of years ago .
No sooner _____ themselves in their seats in the theatre _______ the curtain went up.
Only when _______ .
Then _______ we had been looking forward to.