If you keep on working hard, I have no doubt ___ you’ll be successful in the future.
| A．whether | B．when | C．that | D．if |
Generally speaking, there _______ be any survivors(幸存者) after such a long time. However, two young people were found _______. Life is super-nature!
| A．mustn’t; living | B．can’t; dying |
| C．may; dead | D．can’t; alive |
LastmonthItraveledacrosstheSaharaDesertby______camelwithsomelocals.
What________amazingexperience!
| A．the;an | B．a;/ | C．/;the | D．/;an |
The light bulb ______ by Edison in the middle of the 1780s.
| A．is invented | B．was invented | C．invented | D．invent |
The old scientist has made a great contribution the moon.
| A．in explore | B．to explore | C．explore | D．to exploring |
—What is the table made _______?
—Wood.
| A．by | B．in | C．of | D．from |