The flowers _______ sweet in the botanic garden attract the visitors to the beauty of nature.
| A．to smell |
| B．to be smelt |
| C．smelt |
| D．smelling |
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 |
We ___ our new neighbors yet, so we don't know their names.
| A．don't meet | B．won't meet | C．haven't met | D．hadn't met |