China is a large country, which 9,600,000 square kilometers.
| A．cover |
| B．covering |
| C．covered |
| D．covers |
The chair looks rather hard _______, but in fact it is very comfortable.
| A．to sit | B．to sit on | C．sitting | D．sit |
Nobody knows __________next.
| A．what to do | B．to do what | C．which to do | D．how to do |
It is very important ______ us ________these words.
| A．to, to remember | B．for, to remember | C．for, remember | D．for, remembering |
_______ English well, one must have a lot practice.
| A．For speaking | B．Speaking | C．To speak | D．Speak |
I’m going to the library ______ the books.
| A．return | B．borrow | C．to return | D．to lend |