So much progress ________ made in studies that he is sure to pass the coming examination.
| A．is he | B．has he | C．he is | D．he has |
Whenever he was asked why he was late for class，he would answer carelessly，______ the same thing.
| A．saying | B．said | C．to say | D．say |
He is the most suitable person _______the task.
| A．to finish | B．finishes | C．finished | D．finishing |
_________, the experiment is sure to succeed.
| A．If carefully doing | B．If carefully done |
| C．If it done carefully | D．If it doing carefully |
The cost of buying a house in Beijing is higher than ______in Luoyang。
| A．it | B．one | C．that | D．this |
.There are over 58000 rocky objects in _______space，about 900 of which could fall down onto ______earth。
| A．the；the | B．不填；the | C．the； 不填 | D．不填；不填 |