About seventy percent of our earth _______ by water.
| A．is covering | B．is covered |
| C．are covered | D．are covering |
— Are you willing to live on Mars(火星)?
— ___________ It sounds exciting, but it still worries me.
| A．Of course I am. | B．I’m not sure. |
| C．Why not? | D．Are you joking? |
Stephen lives in a ___________ flat with a big balcony. And he often chats with his friends _________ the balcony.
| A．four bedrooms; in | B．four-bedroom; on |
| C．four bedrooms; on | D．four-bedroom; in |
___________ is it from the hotel? It is about 40 minutes ___________.
| A．How far; take a bus | B．How long; by bus |
| C．How far; by bus | D．How long; take a bus |
The oranges in her garden are ____________________.
| A．enough sweet to eat | B．sweet enough to eat |
| C．enough sweet to eat them | D．sweet enough to eat them |
— _________ I take my cousin Shirley with us, Mr Wu？
— Yes, but we’ll get there by bike. ____________ she ride a bike?
— Yes, and she ___________ ride a bike when she was only six years old.
| A．Could; can; could | B．Can; can; can |
| C．Can; could; could | D．Could; could; can |