These boys had problems________to the top of that mountain．
| A．getting |
| B．to getting |
| C．get |
| D．to get |
Three fifths of the students in our school________boys．
| A．is |
| B．are |
| C．am |
| D．be |
Singapore is a good place________a holiday．
| A．to take |
| B．take |
| C．to taking |
| D．taking |
There are________people who want to travel to China．
| A．two thousands |
| B．two thousand of |
| C．thousands of |
| D．thousand of |
—________she________to Singapore before？
—Yes．She________there last week．
| A．Did；go；went |
| B．Has；been；went |
| C．Have；been；went |
| D．Will；go；went |