The robot needs _______ once a month. And we will check it for you for free.
| A．to check | B．checked |
| C．checking | D．to checking |
Don’t worry, Tom. We have ___________ to do homework.
| A．time enough | B．enough money |
| C．enough time | D．money enough |
Though my grandmother is old, her voice ______beautiful.
| A．sounds | B．gets | C．tastes | D．feels |
How long does it take you __________ your homework in the evening?
| A．to finish | B．finishing |
| C．finish | D．finishes |
Diving is not as____ as skiing.
| A．dangerous | B．more dangerous |
| C．much dangerous | D．very dangerous |
_________ does Jim surf the Internet? Once a week.
| A．How much | B．How many |
| C．How often | D．How soon |