Studying alone, you are free to choose what to learn and when, ____ you don’t need others’ agreement.
| A．while | B．if | C．though | D．as |
Slowly the old woman took out her pocket book, and an old photograph _______ out of it.
| A．had been dropped | B．was dropped |
| C．was dropping | D．dropped |
Chinese President Xi Jinping has _______ a vision of Chinese-driven Asia-Pacific dream at the APEC CEO summit in Beijing.
| A．put forward | B．figured out |
| C．signed up | D．adapted to |
It is uncertain ________ side effect the medicine will bring about, although about two thousand patients have taken it.
| A．that | B．what | C．now | D．whether |
Take care! _______ to frequent smog does great harm to your health.
| A．Exposing | B．To expose |
| C．Exposed | D．Being exposed |
Anyone _______ be in a rough life time, whether he is “Bai Fumei” or “Gao Fushuai.”
| A．must | B．will | C．can | D．should |