In order to finish the experiment successfully, the professor always _________, for every day the light in his room didn’t go out until 4 a.m.
| A．mixed up | B．cleaned up | C．turned up | D．stayed up |
—— Where’s Jack?
—— I think he’s still in＿＿＿bed, but he might just be in＿＿＿bathroom．
| A．／；／ | B．the； the | C．the；／ | D．／； the |
Which is＿＿＿＿＿country, Canada or Australia?
| A．a large | B．larger | C．a larger | D．the larger |
Alexander Graham Bell invented＿＿＿＿＿telephone in1876．
| A．／ | B．a | C．the | D．one |
Beyond＿＿＿＿＿stars, the astronaut saw nothing but＿＿＿＿＿space．
| A．the；／ | B．／； the | C．／；／ | D．the； the |
Alice is fond of playing＿＿＿piano while Henry is interested in listening to＿＿＿music．
| A．／； the | B．／；／ | C．the；／ | D．the； the |