Zhang Heng, one of _____ best-known Chinese astronomers, showed a strong interest in _____ astronomy as a child.
| A．the; the | B．the; 不填 | C．不填; the | D．不填; 不填 |
I recognize her __I met her at the airport, although we haven’t seen each other for ten years.
| A．the moment | B．in the moment |
| C．for the moment | D．at the moment |
Unless ________ to speak, you should remain silent at the conference.
| A．invited | B．inviting | C．being invited | D．having invited |
_____ in Haikou for five years, he is not used to the weather in his hometown.
| A．Live | B．To live | C．Having lived | D．Have lived |
________ we know, the moon goes around the sun.
| A．As long as | B．As far as | C．As much as | D．As soon as |
Eventually, the soldiers made ___ breakthrough and ____ D-Day landings were successful.
| A．the; the | B．the; a | C．a; the | D．a ; a |