People just wonder ________ that makes the housing price so high.
| A．what it is | B．what is it | C．why it does | D．Why does it |
______ the forest park is far away, a lot of tourists visit it every year.
| A．As |
| B．When |
| C．Even though |
| D．In case |
There are still many problems ______ before we are ready for a long stay on the Moon.
| A．solving |
| B．solved |
| C．being solved |
| D．to be solved |
______ I have a word with you? It won't take long.
| A．Can |
| B．Must |
| C．Shall |
| D．Should |
I borrowed the book Sherlock Holmes from the library last week, ______ my classmates recommended to me.
| A．who |
| B．which |
| C．when |
| D．where |
Last night, there were millions of people ______ the opening ceremony live on TV.
| A．watch |
| B．to watch |
| C．watched |
| D．watching |