In January , 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
| A．it marked | B．marking | C．marked | D．to mark |
So far it has been suggested that special stress _____ on pre-school education.
| A．is laid | B．be laid | C．has been laid | D．have been laid |
Looking up ,I saw his eyes ___on me in curiosity.
| A．fixing | B．to fix | C．fixed | D．having fixed |
—Jack failed the driving test again.
—The question is_____ we can help him avoid making the same mistake.
| A．how | B．why | C．what | D．whom |
My meaning didn’t ___so I explained it a second time.
| A．get around | B．get over | C．get through | D．get across |
Little _____ at that time that this“boring”subject would become his favourite later on.
| A．he knew | B．he has known | C．did he know | D．has he known |