What do you do _______ the night _______ October 31st

.People have planted a great many trees in order to _____ wind and sand in the desert.

Guess, how much does it cost—I think itcosts 15 and 20 dollars.

A new subway ________ in Changsha and it will be open to traffic when completed next year.

The policeman warned the driver _______too fast. Itwas very dangerous.