Some abstract modern paintings were ______ my understanding; I simply couldn’t figure out what the painters really wanted to tell us

What_______useful book it is! Yeah,it tells you how to play ______violin.

It was not until 7 o’clock in the evening________to an end

You should try to get a good night’s sleep____ much work you have to do.[ ]

The boy was last seennear the West Lake.[ ]