______has helped to save the drowning boy is worth praising.
| A．Who | B．The one | C．Anyone | D．Whoever |
David said that it was because of his strong interest in literature ___ he chose the course.
| A．that | B．what | C．why | D．how |
Just in front of our house ___ with a history of 1,000 years.
| A．does a tall tree stand | B．stands a tall tree |
| C．a tall tree is standing | D．a tall tree stands |
___ most of the earth’s surface is covered by water, fresh water is very rare and precious.
| A．As | B．Once | C．If | D．Although |
Some experts think that language learning is much ___ for children as their tongues are more flexible.
| A．easy | B．easier | C．easily | D．more easily |
The parents suggested ___ in the hotel room but their kids were anxious to camp out
during the trip .
| A．sleep | B．to sleep | C．sleeping | D．having slept |