Such good use had been his spare time_________ his English has improved a lot．

What’s the time—It is 9:00 the morning.

Of the making of good books there is no end; neither ________ any end to their influence on man’s lives[ ]

Can we go camping tomorrow，as planned？—I’m afraid not. The dark clouds a heavy rain.

13 ___ had they reached the 30th floor ____ they realized that they had forgotten to take the key