We do not know how astronauts can ________ when they spend months in space without the protection of the atmosphere.
| A．get off | B．get up | C．get along | D．get in |
—When did your cousin begin to show his interest in medicine?
—It was a Saturday ___ she noticed her uncle experimenting on a frog in his lab.
| A．that | B．what | C．when | D．which |
____ has been heated discussion over which country bakes the world’ s best pizza: Italy, where pizza began or the US, where it was globalized.
| A．It | B．There | C．That | D．This |
It was ____ exciting news that more than ten students in a single school were admitted to Tsinghua University in the same year.
| A．one | B．an | C．/ | D．a |
____ the end of the performance did the audience get the chance to take photos with the respectable actor.
| A．At | B．By | C．Up to | D．Not until |
—Don t be so naughty! Be your _____.
—Got it.
| A．manners | B．age | C．behavior | D．politeness |