--Did you listen to Mr. Jackson’s lecture?
--Yes, I have never heard a _______one.
The math’s problem remained confusing to the boy although ______ over and over.
| A．explaining | B．being explained | C．explained | D．having explained |
As a rule, you can borrow only two books ______ in the library.
| A．at one time | B．at a time | C．in no time | D．at times |
This kind of desk can be ______ to the height you need.
| A．added | B．adapted | C．adjusted | D．advised |
Mother was in the kitchen ______ lunch while I was ______ the coming exam.
| A．prepared; prepared for | B．preparing; preparing for |
| C．prepared for; prepared | D．preparing for; preparing |
—What do you admire the spaceman ______?
—His bravery to travel around the earth ______ a spaceship all alone.
| A．for; in | B．to; by | C．for; by | D．as; in |