To plant a tree，we must dig_________ .
| A．a three feet deep hole |
| B．three-foot deep a hole |
| C．a hole three feet deep |
| D．a three-feet-deep hole |
It was from the third floor of the teaching building ______ Tom shouted to me, “Wait till I set off.”
| A．what | B．that | C．which | D．where |
Now, with a stronger economy, people ______ enjoy a better quality of life.
| A．would | B．must | C．can | D．need |
Around 70% of the XO model laptops handed out by the government ______ to children who did not have computers at home.
| A．are given | B．gave | C．were given | D．were giving |
The number of people present at the concert was ______ than expected. There were many tickets left.
| A．many more | B．much more | C．much larger | D．much smaller |
It is possible that ______ 2030, cars and airplanes will run on the new fuel.
| A．by | B．on | C．until | D．at |