【单选题】
It is ____ to fly an airplane at three thousand miles an hour.
【单选题】
The eldest child is thoroughly ____ because they
always give him whatever he wants.
【单选题】
When she saw the clouds, she went back to the house to
____ her umbrella.
【单选题】
The new cut in interest rate ____ promote domestic investment.
【单选题】
—__________fine day it is today!—Yes, the sunshine is__________beautiful that Id like to go swimming in the sea.
【单选题】
By cutting down trees we ____ the natural home of birds and animals.
【单选题】
Nowadays, many people suffer from _________ depression under the pressure of working.
【单选题】
Something must have happened on their way. Or they_____
by now.
【单选题】
The treasury issued an order stating that ____ land purchased from the government had to be paid for in gold and silver.
【单选题】
If a substance is dissolved in water or heated, it
may ____ a gas.