About seventy percent of the earth with water.
| A．is covering | B．is covered | C．are covering | D．are covered |
These beautiful photos _______ on the Great Wall last week.
| A．take | B．took | C．are taken | D．were taken |
Don’t turn on the radio. Your father ______ now.
| A．sleeps | B．will sleep | C．is sleeping | D．slept |
Granny often tells us _______ water in our daily life.
| A．save | B．saving | C．to save | D．saves |
Mr. Wang is a teacher. He ______ in this school for 20 years.
| A．has worked | B．worked | C．will work | D．works |
—Mum, when shall we go shopping?
—After I finish _______ the clothes.
| A．wash | B．washed | C．to wash | D．washing |