—Are you going to Hainan for your holidays？
—No，________my parents pay for the trip．
| A．unless |
| B．if |
| C．because |
| D．when |
By the time I got to school, I realized that I ________ my pen at home.
| A．have forgotten | B．have left |
| C．had forgotten | D．had left |
— What _______ your bike yesterday?
— It didn’t work.
| A．was happened in | B．happened in |
| C．was happened to | D．happened to |
Salt _______ in East and South China.
| A．produce | B．is produce |
| C．is produced | D．produced |
Singing the song will help you________ when you feel stressed out.
| A．set up | B．cheer up |
| C．put up | D．think up |
What ________ you do if you ______ me?
| A．would; were | B．will; were | C．would; are | D．will; are |